CASAPPA Hydraulic Gear Motors KM30.34R0

| Overview of CASAPPA KM30.34R0-83E3-LOD/OD-N

CASAPPA KM30.34R0-83E3-LOD/OD-N is a KAPPA 30 (group 3) external gear motor. Casappa builds the KAPPA range around a body and a mounting flange in cast iron of superior mechanical specification, and the KAPPA 30 is a solid, compact two-piece construction that allows several functions to be packed into a reduced space. Inside, the external gear pair runs on sleeve bearings between pressure-balanced thrust plates, so the assembly stays rigid and keeps its volumetric efficiency as pressure rises and as the unit wears. In the standard CSC body design the 34.56 cm³/rev gear set is rated 250 bar constant operating pressure, 270 bar system pressure and 290 bar peak, and turns between 350 and 3,000 r/min.

Its function in a circuit is the reverse of a pump: it converts pressurised oil flow into rotary torque and speed at the output shaft. This unit carries the European E3 mounting flange, the European 1:8 tapered drive shaft made for that flange (code 83) and side-positioned SAE straight-thread ports (position L). Position 2 carries the letter R: the rotation is reversible with an external drain at the rear, so the motor can be driven in either direction once the case drain line is connected. Position 3 is written out as 0, the version without outboard bearing, for applications with no radial or axial load on the shaft, and position 8 is N, the standard Buna NBR seal. The same range can be ordered with European, SAE and ISO mounting flanges, nine drive-shaft options, four port positions and threaded, split-flange or flanged ports, so one motor family covers a wide spread of existing installations.

Two details of the code are worth reading closely on this size. The port pair is written OUT/IN on a motor, and the range pairs OD/OF on the 22–38 cm³/rev sizes — the smaller OD port on the outlet and the larger OF port on the inlet — and OF/OG on the 41–73 sizes; the pair written on this unit is OD/OD, so both ports carry the OD size and the same straight thread. And the 83 drive shaft is the standard combination for the E3 mounting flange, with the A8 and A5 shafts available on the same flange face; the 83 shaft and the E3 flange are not offered on the 41 cm³/rev size.

| Dimension of CASAPPA KM30.34R0-83E3-LOD/OD-N

Reference dimensions for the KM 30•34 single unit with the 83 E3 flange and side ports. The letters correspond to the dimensional drawing.

Interface data needed with the drawing:

| Motor Installation Specifications CASAPPA KM30.34R0-83E3-LOD/OD-N

The Casappa KAPPA 30 motor ordering code is a 12-position string: each position selects one characteristic of the unit, and reading it is the fastest way to check that a motor will fit an existing installation. Positions 1 to 8 define the unit itself; positions 9 to 12 define the drain port, the shaft-seal option, the body design and the painting.

Code structure — KAPPA 30, single motors:

Position 7 is the only position where a pump and a motor of the same size are written differently: the port pair is listed IN/OUT on a pump and OUT/IN on a motor, which is why the same two ports appear in the opposite order on the pump and the motor side of the range. The port codes themselves are read by their first letter — a code beginning with E is a European four-bolt flange, B is a German four-bolt flange, M is an SAE four-bolt flange to the J518 3000 psi series, S is an SAE four-bolt flange to the SSS series, G is a GAS straight thread and O is an SAE straight thread.

| Reading your code: KM30.34R0-83E3-LOD/OD-N

Because position 2 is R, the case must be drained, and the drain line pressure has to stay inside the limit given in Techspecs. Positions 9 to 12 are left unwritten on this number, so the drain port, the shaft-seal variant, the body design and the painting take their standard values: a GAS straight-thread drain port, the standard shaft seal, the CSC Standard body design and no painting.

Techspecs

Performance

Pressure values refer to side ports on unidirectional units; for a reversible unit the maximum pressure is 250 bar (3,600 psi), except the sizes whose rated value is lower.

Interfaces and configuration

Port data — SAE straight-thread ports (ODT) to J514, American straight thread UNC-UNF 60° conforming to ANSI B1.1

On a motor the inlet is the pressure side and the outlet the return side, so with the OD values the inlet port is torqued to 120 +10 Nm (1,062 ÷ 1,151 lbf in) and the outlet to 40 +2.5 Nm (354 ÷ 376 lbf in). Because this unit is reversible, both ports are torqued to the high-pressure-side value — 120 +10 Nm (1,062 ÷ 1,151 lbf in).

Operating conditions

Advantages

Reversible with a rear external drain

One part number covers both directions of rotation, which reduces the number of spares a machine fleet has to carry; the case drain is taken at the rear, and the 5 bar (73 psi) drain line limit at 350 r/min is what keeps the shaft seal inside its rating whichever way the motor turns.

A reversible rating that equals the continuous rating

The published ceiling for a reversible motor is 250 bar (3,600 psi), and the constant operating pressure of this size in the CSC / CSL Standard body is 250 bar — so the motor loses nothing in reversible duty at its continuous pressure.

Torque in a compact cast-iron envelope

148.5 Nm (1,314 lbf in) of theoretical torque at the 270 bar system pressure and 137.5 Nm (1,217 lbf in) at the 250 bar continuous rating (M = Δp × V ÷ 62.83), from a gear set of 34.56 cm³/rev turning at up to 3,000 r/min.

Three body designs on one displacement

The 34.56 cm³/rev size is offered in CSC / CSL Standard at 250 / 270 / 290 bar, HSC / KSL Compact at 210 / 230 / 250 bar and BSC / BSL High performance at 280 / 300 / 320 bar, so the same envelope can be matched to the duty cycle rather than the other way round.

European standard interface

The E3 mounting flange and the 83 European 1:8 tapered drive shaft are the standard combination for this size, so the motor bolts onto the mounting and the coupling that European mobile machinery is already built around.

Straight-thread ports

OD is a threaded O-ring boss to J514 — an American straight thread UNC-UNF 60° to ANSI B1.1 — so the pipework needs no flange halves, and the port torque values (120 +10 Nm on the high-pressure side) are published for both pressure sides.

Cast-iron body and mounting flange

The KAPPA range is built around a body and a mounting flange in cast iron of superior mechanical specification, and the rigidity of that two-piece assembly is what holds reliability and high volumetric efficiency at high operating pressures.

Long service life

Pressure-balanced thrust plates compensate for wear, so the motor keeps its volumetric efficiency as the unit ages and the gear-motor duty cycle accumulates.

High efficiency at high temperature

As the circuit oil heats up and the film thins, the cast-iron structure limits the loss of volumetric efficiency — the property Casappa specifies the KAPPA range for.

Low noise emission

The external gear design keeps running noise low, which is a requirement on fan drives, municipal machinery and equipment working close to the operator.

Compact version 0 body

Position 3 is 0, the version without outboard bearing, which is the shortest build of the range and the one to specify where the motor only sees torque and no radial or axial load on the shaft.

Wide combination choice

European, SAE and ISO mounting flanges, nine drive shafts, four port positions and threaded, split-flange or flanged ports let the same motor be matched to an existing driveline, mounting and pipework.

Suited where fluids and size are critical

KAPPA is the range Casappa positions for applications where noise, contamination, non-flammable fluids and envelope size are the deciding factors.

6. Reference of CASAPPA KM30.34R0-83E3-LOD/OD-N

6.1 The KM 30 range — same series, all displacements

Every size below is a valid position 1 in the KAPPA 30 motor ordering code. Pressures are the ratings for unidirectional motors with side ports and the CSC / CSL Standard body design; for reversible motors the maximum pressure is 250 bar (3,600 psi), except the sizes whose rated value is lower.

The 34.56 cm³/rev size is offered in all three body designs: the Compact design stops at 38 cm³/rev and the High performance design at 46 cm³/rev, so from 51.83 cm³/rev upwards the CSC / CSL Standard body is the one to specify. The matching pump range is KP 30, with the same displacements — the pump and the motor are alternative position-1 entries of the same 12-position code.

6.2 Complete order numbers of the KM 30 range

Complete KAPPA 30 motor order numbers covering the KM 30 range, from KM 30•22 to KM 30•73. Reference only — each number is valid only in the exact configuration it describes.

Code examples in the KM 30 code structure:

7. Brand Replacement

HENGYUHANG supplies a replacement for the CASAPPA KAPPA 30 gear motor series, including KM30.34R0-83E3-LOD/OD-N and the rest of the KM 30 size range from KM 30•22 to KM 30•73. The replacement is built to the same group-3 dimensional envelope and the same international standard interfaces — European, SAE and ISO mounting flanges, the same drive-shaft families and the same threaded, split-flange or flanged port options — so a machine originally fitted with a Casappa KAPPA 30 motor can be returned to service without modifying the driveline, the mounting or the pipework.

Replacement units are supplied to the KAPPA 30 interface and dimension data. Fitment is decided by the ordering code of the original motor, so please quote the complete original order number when enquiring.

8. Applications of CASAPPA KM30.34R0-83E3-LOD/OD-N

Typical applications of the KAPPA 30 gear motor family:

Building and construction — track and wheel drives on compact machines, roller and drum drives and auxiliary circuits on excavators and loaders

Material handling — drive and positioning functions on handling equipment, winches and reel drives

Forestry — feed, conveyor, saw and attachment drives on forestry machinery

Fan drive — engine cooling fan drives and hydraulic fan circuits

Agriculture — drives for headers, conveyors, agitators and implement functions on tractors, balers, harvesters and sprayers

Industrial hydraulics — conveyors, mixers, presses, machine tools and plastic injection moulding machines

Special vehicles — municipal vehicles, aerial work platforms and cleaning vehicles

In these machines the motor drives loads that turn continuously at moderate speed, and is expected to hold torque under sustained load, high duty cycles and demanding ambient conditions. The cast-iron body, the sleeve-bearing gear pair and the pressure-balanced thrust plates are what let the unit hold its volumetric efficiency as circuit pressure and oil temperature rise, and the E3 mounting flange and the rear case drain let it drop into a machine that is already built around European interfaces and needs the motor to work in either direction.

9. Package & Shipping

10. Why Choose Hengyuhang?

A hydraulic specialist, not a general trader. Quanzhou Hengyuhang Power Technology Co., Ltd. is based in Fujian, China and manufactures hydraulic gear pumps and motors, synchronous motors, multiple pump units, pumps with built-in valves and custom valve blocks.

One-piece minimum order. MOQ is one unit, so a single machine can be put back into service without committing to a production batch.

Model-level checking before you order. Send the complete original order number — for this page, the full KM30.34R0-83E3-… string — and the configuration is run against the KAPPA 30 dimension, flange, shaft and port data before the unit is built.

In-house production and testing. CNC machining centres, automatic gear heat-treatment lines, single-piece-flow assembly and an automatic hydraulic test bench, with ERP/MES traceability through production.

Replacement coverage across the range. The same plant supplies replacement units for a wide list of hydraulic brands and models, which keeps a mixed machine fleet on one supplier.

Customization support. OEM, ODM and OBM are offered, and customized packaging, graphics, nameplate and logo are available for distributor orders.

One-year warranty. Every unit is covered by a one-year warranty.

Responsive after-sales. Online support for installation and application questions.