![Manitowoc Grove TMS9000-2 Series Service Manual Download Page 68](http://html.mh-extra.com/html/manitowoc/grove-tms9000-2-series/grove-tms9000-2-series_service-manual_701234068.webp)
2-12
Published 01-14-2021 Control # 707-01
HYDRAULIC SYSTEM
TMS9000-2 SERVICE MANUAL
HYDRAULIC PUMPS
Description
The engine drives the No. 1 gear pump Figure 2-23 mounted
directly to the front cover accessory drive. No. 1 gear pump
supplies the front axle power steering gear and the swing
function.
The No. 2 hydraulic pump assembly (Figure 2-9) is frame
mounted above the transmission and is driven by a
driveshaft attached to the engine PTO. The pump assembly
consists of two variable displacement pumps. The pumps
supply the hoist, lift, telescope directional control valve and
auxiliary hoist.
Maintenance
No. 1 Pump
Removal
1.
Remove the engine cover to gain access to the pump.
2.
Remove the cotter pin from the retaining pin (1,
Figure 2-5) in the two piece shift rod.
.
3.
Separate the shift rod to gain access to pump no. 1.
4.
Remove the capscrews, flatwashers and O-ring
securing the hydraulic tank hose assembly to the pump.
5.
Tag and disconnect all other lines from the pump. Cap all
lines and ports.
6.
Remove the capscrews and flatwashers securing the
pump to the front cover accessory drive. Remove the
pump.
7.
Clean the gasket material from the drive pad and the
pump.
Installation
1.
Install a new gasket to the pump mounting flange.
2.
Install No. 1 pump on the front cover accessory drive
with capscrews and flatwashers. Make sure gear teeth
mesh properly. Torque capscrews according to
3.
Connect the distribution and supply lines as tagged
during removal.
4.
Install the hydraulic tank hose to the pump and secure
with the capscrews, flatwashers and O-ring. Torque
capscrews according to
5.
Assemble the two piece shift rod and insert the retaining
pin. Secure the retaining pin with a new cotter pin.
6.
Before start-up the pump needs to be primed, refer to
Gear Pump Inlet Port Air Purge/Bleed
No. 2 Pump
Removal
1.
Remove the pump cover to gain access to the pumps.
2.
Remove the capscrews, flatwashers and O-ring
securing the hydraulic hose assembles to the pumps.
Tag all hoses for reassembly. Cap all lines and ports.
3.
Remove the capscrews and lockwashers attaching the
pump mounting bracket to the frame. Remove the pump
assembly.
CAUTION
Machine Damage!
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.
9291
FIGURE 2-5
1
CAUTION
Machine Damage!
Keep the pump as level as possible to avoid damaging
the input spline.
CAUTION
Crushing Hazard!
The pump assembly weighs approximately 220 lbs (100
kg). Use an appropriate lifting device to lift the pump.
Fo
r
Only