Pump/Pto Clutch Assembly (Isx Engine); Pto Clutch Lubrication; Pump/Pto Clutch Replacement - Manitowoc Grove TMS800E Service And Maintenance Manual

POWER TRAIN
PUMP/PTO CLUTCH ASSEMBLY (ISX
ENGINE)
The pump PTO clutch is used to engage/disengage pump 1
from the engine to aid in starting, especially in cold weather,
and to prevent the pumps from over-speeding while traveling
the crane. This clutch connects the PTO driveline to pump 1.
The clutch assembly is air operated and electrically
controlled.

PTO Clutch Lubrication

3
2
4
1. Remove access cover (5, Figure 7-17).
2. Open check plug (1, Figure 7-16) and check that oil is
even with bottom of threads.
3. If necessary, remove fill plug (2) and add hydraulic oil
until it is even with the bottom of the check plug threads.
4. Reinstall access cover (5, Figure 7-17) and secure with
hardware (7). Refer to Fasteners and Torque Values,
page 1-13.
When changing oil, place suitable container under drain pan
hose (6, Figure 7-17) before removing drain plug (4,
Figure 7-16). Remove and clean breather (3) and inspect
and clean magnetic drain plug (4) for contamination or
particles before reinstalling. For more information, refer to
Lubrication, page 9-1.

Pump/PTO Clutch Replacement

CAUTION
Damage could occur!
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.
7-30
1
FIGURE 7-16
Published 01-29-2014, Control # 496-00
TMS800E SERVICE MANUAL
3
2
7
Removal
1. Depressurize the hydraulic system.
2. Depressurize the air system and disconnect the clutch
air line (1, Figure 7-17) from the clutch.
3. Remove the cap screws, nuts and washers (2)
connecting the PTO driveline to the engine. Remove the
driveline.
2
1
4. Remove the access cover (1, Figure 7-18) by removing
the four cap screws and washers (2) and two "double-
nut" plates.
5. Tag, disconnect and plug or cap the hydraulic hoses and
ports on the clutch.
6. Tag, disconnect and plug or cap the hydraulic hoses and
ports on the pumps.
7. Tag and disconnect the electrical connectors to the
pumps.
1
4
5
6
FIGURE 7-17
FIGURE 7-18