Hydraulic Pumps; Description; Maintenance - Manitowoc Grove RT9130E-2 Service And Maintenance Manual

HYDRAULIC SYSTEM

HYDRAULIC PUMPS

Description

NOTE: Refer to Figure 2-6 for pump locations.
Pumps No. 1 and No. 2 are mounted on drive pads of the
torque converter. Pump No. 3 is mounted off of the torque
converter via pump disconnect. Pump No. 4 is mounted on a
drive pad of the engine.
The purpose of these pumps is to convert mechanical
energy into fluid energy for the operation of the crane's
hydraulic components.
All four pumps are positive displacement gear-type pumps.
Pumps No. 1 and No. 3 have two sections and pumps No. 2
and No. 4 have only one section.
Pump No. 1
The first section of pump no. 1, the closest to the mounting
3
face, is a 4.95 in /rev (81.1 cm
55.2 gpm (209 l/min) at 2710 rpm. The second section is a
3 3
2.96 in /rev (48.5 cm /rev) section with an output of 33.0
gpm (125 l/min) at 2710 rpm.
Pump No. 2
3
Pump No. 2 is a 2.241 in
output of 25 gpm (95 l/min) at 2710 rpm. An integral flow
divider/relief valve ensures a constant 10 gpm (38 l/min) at
3000 psi (20,670 kPa) at the primary port.
Pump No. 3
The first section of pump No. 3, the closest to the mounting
3
face, is a 4.95 in /rev (81.1 cm
55.2 gpm (209 l/min) at 2710 rpm. The second section is a
3 3
1.48 in /rev (24.3 cm /rev) section with an output of 16.5
gpm (62 l/min) at 2710 rpm.
Pump No. 4
3
Pump No. 4 is a 0.878 in
output of 9.8 gpm (37 l/min) at 2712 rpm. An integral flow
divider/relief valve ensured a constant 6 gpm (23l/min) at
2700 psi (18,600 kPa) at the primary port.

Maintenance

Pump No. 1 Removal
CAUTION
Absolute cleanliness is essential when working on the
hydraulic pumps. Always work in a clean area. The
presence of dirt and foreign materials in the system can
result in serious damage or inadequate operation.
2-16
3
/rev) section with an output of
3
/rev (36.7 cm /rev) pump with an
3
/rev) section with an output of
3
/rev (14.4 cm /rev) pump with an
Published 11-22-2016, Control # 345-12
RT9130E-2 SERVICE MANUAL
1. Remove hardware as needed to gain access to the
pump. The pump is bolted to the engine's torque
converter.
2. Tag and disconnect the supply line from the pump. Cap
or plug the line and port.
3. Tag and disconnect the pump distribution lines from the
pump. Cap or plug the lines and ports.
CAUTION
When removing the pump, keep the pump as level as
possible to avoid damaging the input spline.
4. Remove the four bolts and washers attaching the pump
to the drive pad on the torque converter. Remove the
pump.
5. Clean the gasket material from the drive pad of the
torque converter and from the pump.
6. Cover the drive pad's opening to prevent dirt from
entering.
Pump No. 1 Installation
1. Clean the pump and the torque converter drive pad with
Loctite cleaning solvent 7070 or similar non chlorinated
solvent.
2. Apply a light coating of Loctite primer N7649 to pump
and drive pad. Allow primer to dry for one to two
minutes. Primer must be dry. Mating of parts should
occur within five minutes.
3. Apply gasket material Loctite Master Gasket 518 to
pump and drive pad mounting surfaces. (This material
partially cures in 4 hours and fully cures in 48 hours.)
4. Install pump and gasket on drive pad with bolts and
washers. Make sure the splines mesh properly. Refer to
Fasteners and Torque Values, page 1-18 for the torque
value for the pump mounting bolts.
5. Connect the distribution and supply lines to the pump as
tagged during removal. On lines that use them, discard
any old o-ring and install a new o-ring in its place.
Pump No. 2 Removal
CAUTION
Absolute cleanliness is essential when working on the
hydraulic pumps. Always work in a clean area. The
presence of dirt and foreign materials in the system can
result in serious damage or inadequate operation.