HENGYUHANG Hydraulic Power Unit Forklift Gear Pump SGP1 SGP2 Series|Gear pump|Hydraulic Pumps|Products|HENGYUHANG Power Technology Co., LTD

Gear pump

HENGYUHANG Hydraulic Power Unit Forklift Gear Pump SGP1 SGP2 Series

Engineered with a heavy-duty cast-iron body, high-strength aluminum alloy end covers, and carburized alloy steel gears, the HENGYUHANG SGP1 & SGP2 Series gear pump delivers rated continuous working pressure up to 24.5 MPa (245 bar / 3,553 psi), maximum peak pressure up to 29.4 MPa (294 bar / 4,263 psi), and exceptional volumetric efficiency for demanding mobile material handling applications.

| Applications

Designed specifically for internal combustion and electric forklifts (1.0 to 7.0 tons), container handlers, reach stackers, and industrial hydraulic power units, the SGP1 & SGP2 Series supplies dependable fluid power for mast lifting cylinders, tilt mechanisms, power steering, and auxiliary hydraulic attachments. With standardized horizontal 2-bolt mounting flanges (spigot Ø82 mm, Ø82.55 mm, Ø101.6 mm, Ø102 mm), precision SAE 10-tooth and 13-tooth involute splined shafts, and versatile side flange or rear threaded G ports, it provides seamless 1:1 drop-in replacement for Shimadzu OEM pumps across Toyota, Komatsu, TCM, Mitsubishi, Nissan, Heli, and Hangcha machinery.

| Key Technical Specifications

Product Model: Hengyuhang Hydraulic Forklift Gear Pump SGP1 & SGP2 Series

Brand Replacement: Shimadzu SGP1, SGP2, Toyota, Komatsu, TCM, Mitsubishi, Heli, Hangcha OEM or as requested.

Displacement: SGP1: 16.2 to 36.6 cm³/rev (10 models); SGP2: 20.3 to 52.8 cm³/rev (10 models)

Rotation Direction: Counter-clockwise (L) and Clockwise (R) (viewed looking at drive shaft end)

Speed Range: Minimum operating speed 400–500 r/min; Maximum permissible speed 2,200–4,000 r/min (rated 1,800–2,500 r/min)

Peak Pressure: SGP1 rated continuous 20.6 MPa (206 bar / 2,987 psi), peak up to 24.5 MPa (245 bar); SGP2 rated continuous up to 24.5 MPa (245 bar / 3,553 psi), peak up to 29.4 MPa (294 bar / 4,263 psi)

| Overview of HENGYUHANG SGP1 & SGP2 Series Hydraulic Gear Pumps

The HENGYUHANG SGP1 and SGP2 Series represent the premier heavy-duty benchmark for external hydraulic gear pumps in global forklift, material handling, and mobile power unit engineering. Manufactured under strict ISO 9001 quality protocols, the SGP family encompasses 20 standardized displacement frame sizes:

SGP1 Series (Compact High-Speed Frame): 10 displacements from 16.2 cm³/rev to 36.6 cm³/rev, delivering rated pressure of 20.6 MPa (206 bar) and maximum speeds up to 4,000 r/min.

SGP2 Series (Heavy-Duty High-Pressure Frame): 10 displacements from 20.3 cm³/rev to 52.8 cm³/rev, delivering maximum continuous working pressure up to 24.5 MPa (245 bar) and peak surge pressure up to 29.4 MPa (294 bar / 4,263 psi).

At the heart of the SGP architecture is a premium high-grade cast-iron central body paired with rigid high-tensile aluminum alloy front and rear covers. This hybrid bimetallic construction provides superior damping of hydraulic noise and vibration, withstands severe cyclic pressure fatigue, and guarantees exceptional structural rigidity under maximum mast hoisting loads. The pumping gears are precision-machined from vacuum-carburized alloy steel and finish-ground to microscopic tolerances. Specialized floating alloy steel side plates and high-load wear-resistant DU bushings provide dynamic axial clearance compensation and radial hydraulic pressure balance, ensuring sustained volumetric efficiency (≥ 90%–94%) and extended service life in dusty, high-temperature, and high-frequency warehouse operating environments.

| Dimension of HENGYUHANG SGP1 & SGP2 Series Hydraulic Gear Pumps

| Interface Data Needed with the Drawing Across the SGP1 & SGP2 Models

Interface / Feature Item	Engineering Specification & Dimensional Callout	Standard Design & Fitment Details
SGP1 Mounting Flange (Horizontal 2-Bolt)	Code H — SAE Horizontal 2-Bolt Flange	Bolt hole center-to-center distance: 106 mm; Overall flange width: 130 mm; Bolt slots / holes: 2-Ø 11.5 mm; Centering spigot: Standard Ø 82 mm (−0.035 / −0.090 mm) or Code A Ø 82.55 mm (−0.05 mm / SAE A); Spigot pilot height: 6.5 mm
SGP2 Mounting Flange (Horizontal 2-Bolt)	Code H — SAE Horizontal 2-Bolt Flange	Bolt hole center-to-center distance: 146 mm; Overall flange width: 174 mm; Bolt holes: 2-Ø 14 mm; Centering spigot options: Standard Ø 82 mm, Code Z Ø 102 mm (−0.036 / −0.090 mm), Code A Ø 82.55 mm, or Code B Ø 101.6 mm (−0.05 mm / SAE B); Pilot height: 13 mm
SGP1 Drive Shaft: SAE 13-Tooth Spline	Code 1 — SAE Involute Spline 13T	13 teeth; Diametral Pitch: 16/32 DP; Pressure angle: 30°; Over-pin diameter: 24.891 to 24.819 mm (pin Ø 3.048 mm); Major diameter: Ø 21.806 / Ø 21.679 mm; Effective length: 33 mm; Total shaft extension: 42 mm
SGP1 Drive Shaft: SAE 10-Tooth Spline	Code 5 — SAE Involute Spline 10T	10 teeth; Diametral Pitch: 16/32 DP; Pressure angle: 30°; Over-pin diameter: 20.263 to 20.193 mm (pin Ø 3.048 mm); Major diameter: Ø 17.043 / Ø 16.916 mm; Effective length: 27 mm; Total shaft extension: 36 mm
SGP2 Drive Shaft: SAE 13-Tooth Spline	Code 1 — SAE Involute Spline 13T	13 teeth; Diametral Pitch: 16/32 DP; Pressure angle: 30°; Over-pin diameter: 24.891 to 24.819 mm (pin Ø 3.048 mm); Major diameter: Ø 21.806 / Ø 21.679 mm; Effective length: 29 mm; Total shaft extension: 42 mm
SGP1 Side Oil Ports (Code F1)	Flange Ports on Rear Cover Sides	Inlet Port: Diamond 4-bolt pattern (bolt spacing 52.4 ±0.3 mm × 26.2 ±0.3 mm), 4-M10 (pitch 1.25, thread depth 14 mm min), orifice Ø 25 mm; Outlet Port: Diamond 4-bolt pattern (bolt spacing 47.6 ±0.3 mm × 22.2 ±0.3 mm), 4-M10 (pitch 1.25, thread depth 14 mm min), orifice Ø 20 mm
SGP1 Rear Oil Ports (Code D2)	Threaded Ports on Rear Cover End Face	Inlet Port: G 1" (BSPP thread, thread depth 21 mm min); Outlet Port: G 1/2" (BSPP thread, thread depth 16 mm min)
SGP2 Side Oil Ports (Code F1)	Flange Ports on Rear Cover Sides	Inlet Port: Diamond 4-bolt pattern (bolt spacing 58.7 ±0.3 mm × 30.2 ±0.3 mm), 4-M10 (pitch 1.5, thread depth 20 mm min), orifice Ø 32 mm; Outlet Port: Diamond 4-bolt pattern (bolt spacing 52.4 ±0.3 mm × 26.2 ±0.3 mm), 4-M10 (pitch 1.5, thread depth 20 mm min), orifice Ø 25 mm
SGP2 Rear Oil Ports (Code D2)	Threaded Ports on Rear Cover End Face	Inlet Port: G 1" (BSPP thread, thread depth 21 mm min); Outlet Port: G 1/2" (BSPP thread, thread depth 16 mm min)
Direction of Rotation	Code L (CCW) and Code R (CW)	L (Counter-clockwise): Standard forklift rotation viewed facing drive shaft end; R (Clockwise): Clockwise rotation available upon application requirement

| Pump Installation Specifications

| Modular Model Ordering Code Structure

SGP□□□□□□□□−□XXX

SGP[Series][Spigot][Size][Port Position][Port Config][Mounting][Shaft]−[Rotation][Code]

Position / Digit	Designation Element	Description & Permissible Options
1. Series Number	SGP1 / SGP2	SGP1 = SGP 1 Series (Cast-Iron Body, 16.2 to 36.6 cm³/rev); SGP2 = SGP 2 Series (Heavy-Duty Cast-Iron Body, 20.3 to 52.8 cm³/rev)
2. Mounting Spigot	—, A, Z, B	For SGP1: — = Ø 82 mm (−0.035 / −0.090); A = Ø 82.55 mm (−0.05); For SGP2: — = Ø 82 mm; Z = Ø 102 mm (−0.036 / −0.090); A = Ø 82.55 mm; B = Ø 101.6 mm (−0.05)
3. Size / Displacement	16 to 52	SGP1: 16 (16.2), 18 (18.3), 20 (20.4), 23 (23.7), 25 (24.9), 27 (27.8), 30 (29.9), 32 (33.2), 34 (34.1), 36 (36.6); SGP2: 20 (20.3), 23 (23.3), 25 (25.3), 27 (27.4), 32 (32.5), 36 (36.5), 40 (40.6), 44 (44.7), 48 (48.7), 52 (52.8)
4. Position of Ports	F, D	F = Rear cover side ports; D = Rear end cover ports
5. Port Configuration	1, 2	1 = Flange port with 4-M10 metric bolt pattern (side ports only); 2 = G screw thread (Inlet G1", Outlet G1/2", rear ports only)
6. Mounting Flange	H	H = Horizontal 2-bolt flange (SGP1: 106 mm center distance; SGP2: 146 mm center distance)
7. Drive Shaft End	1, 5	1 = SAE Involute Spline 13-tooth (16/32 DP, 30° PA, standard for SGP1 & SGP2); 5 = SAE Involute Spline 10-tooth (16/32 DP, 30° PA, available for SGP1)
8. Direction of Rotation	L, R	L = Counter-clockwise rotation (standard default, viewed facing drive shaft); R = Clockwise rotation
9. Design / Code Number	XXX	3-digit numerical factory specification code denoting customer-specific configuration

| Reading Your Replacement Code

Target OEM Part Number	Target Forklift Machine Application	HENGYUHANG 1:1 Direct Replacement Model
Shimadzu SGP1A20A2H9-L337D	Toyota 7FD/7FG 1.5–2.5 Ton Forklifts (1DZ/2Z Engine)	SGP1A20A2H9-L337D (Exact 1:1 Drop-in Replacement)
Shimadzu SGP1A25A2H9-L090C	Toyota 8FD/8FG 2.0–3.0 Ton Forklifts (1DZ-II/2Z Engine)	SGP1A25A2H9-L090C (Exact 1:1 Drop-in Replacement)
Shimadzu SGP1A36D2H1-L028C	Komatsu FD20/25/30-16 / -17 (4D94LE/4D98E Engine)	SGP1A36D2H1-L028C (Exact 1:1 Drop-in Replacement)
Shimadzu SGP1A32F1H1-L	TCM FD20–FD30T3 Forklifts (Isuzu C240 Engine)	SGP1A32F1H1-L (Exact 1:1 Drop-in Replacement)
Shimadzu SGP1-36F1H1-L	Mitsubishi / CAT FD25–FD30 (S4S Engine)	SGP1-36F1H1-L (Exact 1:1 Drop-in Replacement)
Shimadzu SGP2-36F1H1-L	Nissan / UniCarriers 3.0–3.5 Ton Heavy Mast Hoist	SGP2-36F1H1-L (Exact 1:1 Drop-in Replacement)
Shimadzu SGP2-44F1H1-L	Heli / Hangcha 3.5–5.0 Ton Diesel Forklifts	SGP2-44F1H1-L (Exact 1:1 Drop-in Replacement)
Shimadzu SGP2-52F1H1-L	Heavy 5.0–7.0 Ton Material Handling Trucks	SGP2-52F1H1-L (Exact 1:1 Drop-in Replacement)

HENGYUHANG Hydraulic Power Unit Forklift Gear Pump SGP1 SGP2 Series (Cast-Iron Body High-Pressure Hydraulic Gear Pump, 16.20~52.80 cm³/rev) is a heavy-duty, high-performance cast-iron body external hydraulic gear pump series engineered specifically for internal combustion and electric industrial forklifts, mobile material handling vehicles, hydraulic power units (HPU), and heavy-duty lifting equipment. Manufactured by Quanzhou Hengyuhang Power Technology Co., Ltd. to exacting precision standards, the SGP1 and SGP2 Series combine high-strength cast iron central pump bodies with rigid aluminum alloy front and rear covers, case-hardened high-purity alloy steel drive and driven gears, and special alloy steel sleeve bushings with precision pressure-balanced side wear plates. The cast-iron center housing provides exceptional structural rigidity, anti-fatigue resistance, and superior acoustic damping under severe cyclic pressure pulses, preventing housing expansion under continuous rated working pressures up to 24.5 MPa (245 bar / 3,553 psi) and maximum peak pressures reaching 29.4 MPa (294 bar / 4,263 psi). Operating across an expansive displacement envelope from 16.20 to 52.80 cm³/rev (in³: 0.988 to 3.221) and speeds up to 4000 min⁻¹, the SGP1 and SGP2 Series feature precision-ground teeth profiles, synthetic resin back-up seals, and dual nitrile elastomeric seals that deliver outstanding volumetric efficiency (≥ 90%~93%) and ultra-low operating noise across the entire speed and pressure range. Designed with standardized 2-bolt horizontal mounting flanges (pilot diameters Ø82 mm, SAE Ø82.55 mm, Ø101.6 mm, and Ø102 mm), precision involute splined drive shafts (SAE 10-tooth and 13-tooth, 16/32 DP, 30° pressure angle), and flexible porting options including 4-bolt split flange side ports (Code F1) and threaded rear ports (Code D2 with G 1 suction and G 1/2 delivery), the SGP1/SGP2 Series serves as an ultra-reliable, direct-fit OEM replacement and factory-grade equipment pump for premier forklift platforms, warehouse stackers, container handlers, and industrial hydraulic systems worldwide.

| Applications

The SGP1 and SGP2 Series cast-iron gear pumps are purpose-engineered for high-pressure, shock-loaded material handling and mobile industrial machinery:

Internal Combustion & Electric Forklift Trucks: Primary main hydraulic pump powering mast lift, tilt cylinders, steering assist circuits, and auxiliary hydraulic attachments on 1.5-ton to 5.0-ton diesel, gasoline, LPG, and battery-electric warehouse forklifts.
Heavy Container Handlers & Reach Stackers: Supplies continuous high-pressure fluid power for secondary hydraulic functions, cab positioning, and spreader locking circuits on port container handling machinery.
Electric Pallet Trucks & Narrow-Aisle Reach Trucks: Delivers compact, high-efficiency, low-noise lifting fluid power for high-lift electric warehouse stackers, order pickers, and automated guided vehicles (AGV).
Commercial Tail Lifts & Demountable Truck Bodies: Powers heavy electro-hydraulic power pack lifting units for logistics box trucks, flatbed trailers, and refrigerated freight tailgates.
Mobile Elevating Work Platforms (MEWP): Provides smooth, pulsation-free hydraulic power for telescopic boom elevation, scissor lift mechanisms, and self-propelled rough-terrain access platforms.
Industrial Hydraulic Power Packs & Baling Presses: Delivers durable, long-life continuous high-pressure fluid delivery for compact waste compactors, scrap balers, and stationary factory clamping fixtures.

| Key Specifications Overview

Parameter	Hengyuhang SGP1 / SGP2 Series Engineering Specification
Pump Classification	Heavy-Duty External Hydraulic Gear Pump for Forklifts & Industrial Machinery (SGP1 / SGP2 Series)
Pump Body & Casing Material	High-grade, high-density cast iron central body with high-tensile aluminum alloy front and rear end covers
Displacement Coverage (SGP1 Series)	10 Standard Displacements: 16.2, 18.3, 20.4, 23.7, 24.9, 27.8, 29.9, 33.2, 34.1, and 36.6 cm³/rev (mL/r)
Displacement Coverage (SGP2 Series)	10 Standard Displacements: 20.3, 23.3, 25.3, 27.4, 32.5, 36.5, 40.6, 44.7, 48.7, and 52.8 cm³/rev (mL/r)
Nominal Rated Operating Pressure	SGP1: 20.6 MPa (206 bar / 2,987 psi) [17.2~18.6 MPa for sizes 34~36 with 10T shaft]; SGP2: 17.2~24.5 MPa (172~245 bar / 2,494~3,553 psi)
Maximum Peak Operating Pressure	SGP1: 22.6~24.5 MPa (226~245 bar / 3,277~3,553 psi); SGP2: 20.6~29.4 MPa (206~294 bar / 2,987~4,263 psi)
Rotational Speed Range (SGP1)	Minimum: 400~500 min⁻¹; Maximum: 3000~4000 min⁻¹ (depending on displacement rating)
Rotational Speed Range (SGP2)	Minimum: 400 min⁻¹; Maximum: 2200~3000 min⁻¹ (Side Ports) / 2000~2500 min⁻¹ (Rear Ports)
Volumetric Efficiency Rating	≥ 90%~93% under rated operating conditions with pressure-compensated special alloy steel side wear plates
Gears & Rotating Shaft Assembly	Integral drive and driven gears manufactured from case-hardened alloy steel with precision-ground micro-tooth profile
Journal Bushing & Bearing System	Four heavy-duty special alloy steel sleeve bushings offering superior hydrodynamic film stability and shock load absorption
Internal Sealing Technology	Pressure-balanced side plates with dual nitrile rubber (NBR) gaskets, synthetic resin back-up rings, and heavy-duty shaft oil seal
Mounting Flange Standards	Horizontal 2-bolt flange (Code H): SGP1 bolt pitch 106 mm (pilot Ø82 / Ø82.55 mm); SGP2 bolt pitch 146 mm (pilot Ø82 / Ø82.55 / Ø101.6 / Ø102 mm)
Drive Shaft Configurations	SAE Involute Splines (16/32 DP, 30° pressure angle): SGP1 Shaft 1 (13-tooth) & Shaft 5 (10-tooth); SGP2 Shaft 1 (13-tooth)
Fluid Port Configurations	Code F1: 4-Bolt split flange side ports (SGP1: inlet Ø25 / outlet Ø20; SGP2: inlet Ø32 / outlet Ø25); Code D2: Rear ports (G 1 inlet / G 1/2 outlet)
Permissible Inlet Pressure Range	-0.02 to +0.20 MPa (-0.20 to +2.0 bar / -2.9 to +29 psi) at continuous rated speed
Direction of Rotation	Counter-Clockwise (Code L, standard for forklift engines) or Clockwise (Code R, viewed facing drive shaft)
Unit Mass Range	SGP1: 3.30 kg to 4.50 kg (7.26 to 9.90 lb); SGP2: 4.40 kg to 6.80 kg (9.68 to 14.96 lb)
Hydraulic Fluid Compatibility	Premium anti-wear mineral hydraulic oils (ISO VG 32, 46; DIN 51524 HLP); Viscosity: 10 to 380 mm²/s; Operating Temp: -20°C to +80°C
Filtration Cleanliness Standard	ISO 4406 Class 19/16 or NAS 1638 Class 10 (nominal 25 μm suction filtration recommended to protect alloy bushings and gear faces)

| Technical Performance Matrix Across Available Sizes

Series & Model Number	Geometric Displacement		Operating Pressure (Rated / Peak)			Speed Range (min⁻¹)		Theoretical Delivery Flow (L/min)		Unit Mass
Series & Model Number	cm³/rev	in³/rev	MPa	bar	psi	Min.	Max.	@ 1500 min⁻¹	@ 2000 min⁻¹	kg	lb
SGP1 Series Cast-Iron Body Hydraulic Gear Pumps (16.20 to 36.60 cm³/rev)
SGP1-16	16.2	0.988	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	24.30	32.40	3.30	7.26
SGP1-18	18.3	1.116	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	27.45	36.60	3.40	7.48
SGP1-20	20.4	1.244	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	30.60	40.80	3.50	7.70
SGP1-23	23.7	1.446	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	35.55	47.40	3.70	8.14
SGP1-25	24.9	1.519	20.6 / 24.5	206 / 245	2987 / 3553	500	3500	37.35	49.80	3.80	8.36
SGP1-27	27.8	1.696	20.6 / 24.5	206 / 245	2987 / 3553	500	3500	41.70	55.60	4.00	8.80
SGP1-30	29.9	1.824	20.6 / 24.5	206 / 245	2987 / 3553	400	3500	44.85	59.80	4.10	9.02
SGP1-32	33.2	2.025	20.6 / 24.5	206 / 245	2987 / 3553	400	3500	49.80	66.40	4.20	9.24
SGP1-34	34.1	2.080	20.6 (18.6) / 24.5	206 (186) / 245	2987 (2697) / 3553	400	3000	51.15	68.20	4.30	9.46
SGP1-36	36.6	2.233	20.6 (17.2) / 22.6	206 (172) / 226	2987 (2494) / 3277	400	3000	54.90	73.20	4.50	9.90
SGP2 Series Cast-Iron Body Hydraulic Gear Pumps (20.30 to 52.80 cm³/rev)
SGP2-20	20.3	1.238	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	30.45	40.60	4.90 (4.40)	10.78 (9.68)
SGP2-23	23.3	1.421	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	34.95	46.60	5.10 (4.60)	11.22 (10.12)
SGP2-25	25.3	1.543	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	37.95	50.60	5.30 (4.80)	11.66 (10.56)
SGP2-27	27.4	1.671	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	41.10	54.80	5.40 (4.90)	11.88 (10.78)
SGP2-32	32.5	1.983	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	48.75	65.00	5.70 (5.10)	12.54 (11.22)
SGP2-36	36.5	2.227	24.5 / 29.4	245 / 294	3553 / 4263	400	3000 (2500)	54.75	73.00	5.90 (5.30)	12.98 (11.66)
SGP2-40	40.6	2.477	22.6 / 27.5	226 / 275	3277 / 3988	400	2500 (2300)	60.90	81.20	6.10 (5.40)	13.42 (11.88)
SGP2-44	44.7	2.727	20.6 / 24.5	206 / 245	2987 / 3553	400	2300 (2300)	67.05	89.40	6.30 (5.60)	13.86 (12.32)
SGP2-48	48.7	2.970	18.6 / 22.6	186 / 226	2697 / 3277	400	2300 (2000)	73.05	97.40	6.60 (5.90)	14.52 (12.98)
SGP2-52	52.8	3.221	17.2 / 20.6	172 / 206	2494 / 2987	400	2200 (2000)	79.20	105.60	6.80 (6.10)	14.96 (13.42)

| Mounting Flange, Shaft and Port Dimensional Standards

Configuration Group	Standard Designation	Engineering Specifications & Dimensional Values
SGP1 Mounting Flange	Code H (Horizontal 2-Bolt)	Bolt center distance: 106.0 mm with 2 × 11.5 mm open mounting ear slots; Width: 130.0 mm; Height: 116.0 mm; Spigot centering pilot: Standard Code '-' = Ø82.0 mm (-0.035 / -0.090 mm); Code 'A' = Ø82.55 mm (-0.05 mm); Pilot projection depth: 6.5 mm; Flange ear thickness: 12.5 mm.
SGP2 Mounting Flange	Code H (Horizontal 2-Bolt)	Bolt center distance: 146.0 mm with 2 × 14.0 mm open mounting ear slots; Width: 174.0 mm; Height: 120.0 mm; Spigot centering pilot: Standard Code '-' = Ø82.0 mm (-0.035/-0.090 mm); Code 'A' = Ø82.55 mm (-0.05 mm); Code 'Z' = Ø102.0 mm (-0.036/-0.090 mm); Code 'B' = Ø101.6 mm (-0.05 mm); Spigot length: 13.0 mm.
SGP1 Involute Splined Shafts	Code 1 & Code 5 (SAE Spline)	Code 1 (13-Tooth): 13T, 16/32 DP, 30° pressure angle; Major Ø21.806/Ø21.679 mm, minor Ø18.63 mm max, over-pin dia 24.891~24.819 mm (pin Ø3.048 mm); Extension: 33.0 mm (42.0 mm total). Code 5 (10-Tooth): 10T, 16/32 DP, 30° PA; Major Ø17.043/Ø16.916 mm, minor Ø13.868 mm max, over-pin dia 20.263~20.193 mm (pin Ø3.048 mm); Extension: 27.0 mm (36.0 mm total).
SGP2 Involute Splined Shaft	Code 1 (SAE Spline 13-Tooth)	Code 1: 13T, 16/32 DP, 30° pressure angle; Major Ø21.806/Ø21.679 mm, minor Ø18.63 mm max, over-pin dia 24.891~24.819 mm (pin Ø3.048 mm); Extension: 29.0 mm (42.0 mm total from mounting face).
SGP1 Side Port Dimensions (F1)	4-Bolt Split Flange Ports	Inlet Port: Ø25.0 mm fluid bore with 4 × M10 × 1.25 threaded bolt holes (depth 14.0 mm min) on 52.4 ±0.3 mm × 26.2 ±0.3 mm pattern; Outlet Port: Ø20.0 mm fluid bore with 4 × M10 × 1.25 threaded bolt holes (depth 14.0 mm min) on 47.6 ±0.3 mm × 22.2 ±0.3 mm pattern.
SGP2 Side Port Dimensions (F1)	4-Bolt Split Flange Ports	Inlet Port: Ø32.0 mm fluid bore with 4 × M10 × 1.5 threaded bolt holes (depth 20.0 mm min) on 58.7 ±0.3 mm × 30.2 ±0.3 mm pattern; Outlet Port: Ø25.0 mm fluid bore with 4 × M10 × 1.5 threaded bolt holes (depth 20.0 mm min) on 52.4 ±0.3 mm × 26.2 ±0.3 mm pattern.
Rear Threaded Port Dimensions (D2)	BSPP (G Thread) Rear Cover	Inlet Port: G 1 threaded port (depth 21.0 mm min); Outlet Port: G 1/2 threaded port (depth 16.0 mm min) centrally positioned on rear cover. Available on both SGP1 and SGP2 Series.

| Overall Body Dimensional Matrix (L1, L2, L3, L4 in mm)

Displacement Frame Size	SGP1 Series Dimensions (mm)			SGP2 Series Dimensions (mm)
Displacement Frame Size	L1 (Port Center)	L2 (Side Ports Total)	L3 (Rear Ports Total)	L1 (Port Center)	L2 (Side Ports Total)	L3 (Port Face)	L4 (Rear Ports Total)
Size 16	98.0	121.5	108.0	—	—	—	—
Size 18	100.5	124.0	110.5	—	—	—	—
Size 20	103.0	126.5	113.0	95.6	138.0	101.6	104.0
Size 23	107.0	130.5	117.0	98.6	141.0	104.6	107.0
Size 25	108.5	132.0	118.5	100.6	143.0	106.6	109.0
Size 27	112.0	135.5	122.0	102.6	145.0	108.6	111.0
Size 30	114.5	138.0	124.5	—	—	—	—
Size 32	118.5	142.0	128.5	107.6	150.0	113.6	116.0
Size 34	119.5	143.0	129.5	—	—	—	—
Size 36	122.5	146.0	132.5	111.6	154.0	117.6	120.0
Size 40	—	—	—	115.6	158.0	121.6	124.0
Size 44	—	—	—	119.6	162.0	125.6	128.0
Size 48	—	—	—	123.6	166.0	129.6	132.0
Size 52	—	—	—	127.6	170.0	133.6	136.0

| Model Coding & Ordering Information

Code Position	Code Designation	Standard Code Options	Technical Definition & Description
[1] Series Name	Pump Model Series	SGP1 / SGP2	Heavy-Duty Cast-Iron Body Hydraulic Gear Pump for Forklifts (SGP1: 16~36 cm³/rev; SGP2: 20~52 cm³/rev)
[2] Mounting Spigot	Pilot Centering Diameter	'-' / A / Z / B	Code '-': Ø82.0 mm (-0.035/-0.090 mm); Code A: Ø82.55 mm (-0.05 mm); Code Z: Ø102.0 mm (-0.036/-0.090 mm, SGP2 only); Code B: Ø101.6 mm (-0.05 mm, SGP2 only)
[3] Displacement Size	Nominal Displacement Code	16, 18, 20, 23, 25, 27, 30, 32, 34, 36 (SGP1) / 20~52 (SGP2)	Frame size designating geometric displacement in cm³/rev (mL/r)
[4] Port Position	Fluid Port Location	F / D	Code F: Rear cover side ports; Code D: Rear cover axial rear ports
[5] Port Configuration	Connection Style	1 / 2	Code 1: 4-Bolt split flange ports (side ports only); Code 2: G screw thread (rear ports only: G 1 suction, G 1/2 delivery)
[6] Mounting Style	Flange Mounting Orientation	H	Code H: Horizontal 2-bolt mounting flange
[7] Drive Shaft End	Shaft Connection Profile	1 / 5	Code 1: SAE Spline 13 teeth (16/32 DP, 30° PA); Code 5: SAE Spline 10 teeth (16/32 DP, 30° PA, SGP1 only)
[8] Direction of Rotation	Shaft Rotation Direction	L / R	Code L: Counter-Clockwise rotation (standard, viewed facing drive shaft); Code R: Clockwise rotation
[9] Modification Code	Factory Specification Code	XXX	Three-figure code designating specific OEM application revisions and factory port fittings

| Technical Performance Matrix Across Available Sizes

Series & Model Number	Geometric Displacement		Operating Pressure (Rated / Peak)			Speed Range (min⁻¹)		Theoretical Delivery Flow (L/min)		Unit Mass
Series & Model Number	cm³/rev	in³/rev	MPa	bar	psi	Min.	Max.	@ 1500 min⁻¹	@ 2000 min⁻¹	kg	lb
SGP1 Series Cast-Iron Body Hydraulic Gear Pumps (16.20 to 36.60 cm³/rev)
SGP1-16	16.2	0.988	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	24.30	32.40	3.30	7.26
SGP1-18	18.3	1.116	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	27.45	36.60	3.40	7.48
SGP1-20	20.4	1.244	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	30.60	40.80	3.50	7.70
SGP1-23	23.7	1.446	20.6 / 24.5	206 / 245	2987 / 3553	500	4000	35.55	47.40	3.70	8.14
SGP1-25	24.9	1.519	20.6 / 24.5	206 / 245	2987 / 3553	500	3500	37.35	49.80	3.80	8.36
SGP1-27	27.8	1.696	20.6 / 24.5	206 / 245	2987 / 3553	500	3500	41.70	55.60	4.00	8.80
SGP1-30	29.9	1.824	20.6 / 24.5	206 / 245	2987 / 3553	400	3500	44.85	59.80	4.10	9.02
SGP1-32	33.2	2.025	20.6 / 24.5	206 / 245	2987 / 3553	400	3500	49.80	66.40	4.20	9.24
SGP1-34	34.1	2.080	20.6 (18.6) / 24.5	206 (186) / 245	2987 (2697) / 3553	400	3000	51.15	68.20	4.30	9.46
SGP1-36	36.6	2.233	20.6 (17.2) / 22.6	206 (172) / 226	2987 (2494) / 3277	400	3000	54.90	73.20	4.50	9.90
SGP2 Series Cast-Iron Body Hydraulic Gear Pumps (20.30 to 52.80 cm³/rev)
SGP2-20	20.3	1.238	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	30.45	40.60	4.90 (4.40)	10.78 (9.68)
SGP2-23	23.3	1.421	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	34.95	46.60	5.10 (4.60)	11.22 (10.12)
SGP2-25	25.3	1.543	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	37.95	50.60	5.30 (4.80)	11.66 (10.56)
SGP2-27	27.4	1.671	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	41.10	54.80	5.40 (4.90)	11.88 (10.78)
SGP2-32	32.5	1.983	24.5 / 29.4	245 / 294	3553 / 4263	400	3000	48.75	65.00	5.70 (5.10)	12.54 (11.22)
SGP2-36	36.5	2.227	24.5 / 29.4	245 / 294	3553 / 4263	400	3000 (2500)	54.75	73.00	5.90 (5.30)	12.98 (11.66)
SGP2-40	40.6	2.477	22.6 / 27.5	226 / 275	3277 / 3988	400	2500 (2300)	60.90	81.20	6.10 (5.40)	13.42 (11.88)
SGP2-44	44.7	2.727	20.6 / 24.5	206 / 245	2987 / 3553	400	2300 (2300)	67.05	89.40	6.30 (5.60)	13.86 (12.32)
SGP2-48	48.7	2.970	18.6 / 22.6	186 / 226	2697 / 3277	400	2300 (2000)	73.05	97.40	6.60 (5.90)	14.52 (12.98)
SGP2-52	52.8	3.221	17.2 / 20.6	172 / 206	2494 / 2987	400	2200 (2000)	79.20	105.60	6.80 (6.10)	14.96 (13.42)

| Mounting Flange, Shaft and Port Dimensional Standards

Configuration Group	Standard Designation	Engineering Specifications & Dimensional Values
SGP1 Mounting Flange	Code H (Horizontal 2-Bolt)	Bolt center distance: 106.0 mm with 2 × 11.5 mm open mounting ear slots; Width: 130.0 mm; Height: 116.0 mm; Spigot centering pilot: Standard Code '-' = Ø82.0 mm (-0.035 / -0.090 mm); Code 'A' = Ø82.55 mm (-0.05 mm); Pilot projection depth: 6.5 mm; Flange ear thickness: 12.5 mm.
SGP2 Mounting Flange	Code H (Horizontal 2-Bolt)	Bolt center distance: 146.0 mm with 2 × 14.0 mm open mounting ear slots; Width: 174.0 mm; Height: 120.0 mm; Spigot centering pilot: Standard Code '-' = Ø82.0 mm (-0.035/-0.090 mm); Code 'A' = Ø82.55 mm (-0.05 mm); Code 'Z' = Ø102.0 mm (-0.036/-0.090 mm); Code 'B' = Ø101.6 mm (-0.05 mm); Spigot length: 13.0 mm.
SGP1 Involute Splined Shafts	Code 1 & Code 5 (SAE Spline)	Code 1 (13-Tooth): 13T, 16/32 DP, 30° pressure angle; Major Ø21.806/Ø21.679 mm, minor Ø18.63 mm max, over-pin dia 24.891~24.819 mm (pin Ø3.048 mm); Extension: 33.0 mm (42.0 mm total). Code 5 (10-Tooth): 10T, 16/32 DP, 30° PA; Major Ø17.043/Ø16.916 mm, minor Ø13.868 mm max, over-pin dia 20.263~20.193 mm (pin Ø3.048 mm); Extension: 27.0 mm (36.0 mm total).
SGP2 Involute Splined Shaft	Code 1 (SAE Spline 13-Tooth)	Code 1: 13T, 16/32 DP, 30° pressure angle; Major Ø21.806/Ø21.679 mm, minor Ø18.63 mm max, over-pin dia 24.891~24.819 mm (pin Ø3.048 mm); Extension: 29.0 mm (42.0 mm total from mounting face).
SGP1 Side Port Dimensions (F1)	4-Bolt Split Flange Ports	Inlet Port: Ø25.0 mm fluid bore with 4 × M10 × 1.25 threaded bolt holes (depth 14.0 mm min) on 52.4 ±0.3 mm × 26.2 ±0.3 mm pattern; Outlet Port: Ø20.0 mm fluid bore with 4 × M10 × 1.25 threaded bolt holes (depth 14.0 mm min) on 47.6 ±0.3 mm × 22.2 ±0.3 mm pattern.
SGP2 Side Port Dimensions (F1)	4-Bolt Split Flange Ports	Inlet Port: Ø32.0 mm fluid bore with 4 × M10 × 1.5 threaded bolt holes (depth 20.0 mm min) on 58.7 ±0.3 mm × 30.2 ±0.3 mm pattern; Outlet Port: Ø25.0 mm fluid bore with 4 × M10 × 1.5 threaded bolt holes (depth 20.0 mm min) on 52.4 ±0.3 mm × 26.2 ±0.3 mm pattern.
Rear Threaded Port Dimensions (D2)	BSPP (G Thread) Rear Cover	Inlet Port: G 1 threaded port (depth 21.0 mm min); Outlet Port: G 1/2 threaded port (depth 16.0 mm min) centrally positioned on rear cover. Available on both SGP1 and SGP2 Series.