Manitowoc Grove TMS800E Service And Maintenance Manual page 52

HYDRAULIC SYSTEM
side of the pump is plugged. Fill housing full of
hydraulic oil through "T1" port. Re-install the plastic
cap and then install the pump.
3. Remove adapter and hose from "T1" port, and check to
ensure "T2" port on the opposite side of the pump is
plugged. Fill housing full of hydraulic oil through "T1"
port. Re-install the adapter and hose into the "T1" port.
4. Start the engine and idle it for two or three minutes
without running any hydraulic functions. Check for leaks;
as needed, stop the engine and make repairs.
CAUTION
If the pump becomes hot to the touch, it is binding and
may seize. Stop engine, disassemble pump, and repair it
so it will not bind.
5. Place your hand on the piston pump section to check for
excessive heat build-up. If the piston pump section is too
hot to keep your hand on, stop immediately. If the pump
makes excessive noise it is probably sucking air,
keeping the pump from priming. If this occurs, stop
engine, and inspect all connections of the suction hose/
tube for a loose connection, or a missing or damaged O-
ring. Re-start the engine and run until the pump takes
prime for a maximum of 30 seconds. If the pump does
not prime in 30 seconds, stop the engine and repeat until
the pump primes.
6. Increase the RPM to 1500-1800 for 1 to 2 minutes with
no functions actuated and make checks again per step
5. Incrementally increase throttle to full RPM and then
cycle the functions that the pump section supples to
verify proper speed. Verify pump flow. Verify there is no
leaking.
7. Check pressure settings. Refer to Pressure Setting
Procedures, page 2-24 in this section.
No. 1 Pump Gear Pump Section Startup Procedure
CAUTION
Do not feed hot hydraulic oil into a cold pump. This may
cause the pump to seize.
2-16
1. Ensure the reservoir is filled with the proper hydraulic
fluid to the high level mark on the reservoir sight gauge.
2. Ensure no air is entering the pump inlet, and that the
pump suction or inlet fluid is not bleeding back to the
reservoir when the engine is stopped, by making sure all
suction or inlet lines are air tight.
3. Remove each pump section outlet hose. Fill each pump
outlet port of the pump section with as much hydraulic oil
as it will take. Then reinstall each outlet hose.
4. Start the engine and idle it for two or three minutes
without running any hydraulic functions. Check for leaks;
as needed, stop the engine and make repairs.
If the pump becomes hot to the touch, it is binding and
may seize. Stop engine, disassemble pump, and repair it
so it will not bind.
5. Place your hand on the gear pump section to check for
excessive heat buildup. If the gear pump section is too
hot to keep a hand on, stop the engine. Each section
should feel about the same warmth, but pressure drops
in each pump section's circuit would explain some
difference between the two.
6. Listen for abnormal noises indicating low hydraulic oil
level or internal pump problems. If the pump is making
excessive noise, it is probably sucking air into its inlet,
keeping it from priming. In case of abnormal noise, stop
engine, and inspect the pump and the suction line for a
loose connection, a leak, or a damaged or missing O-
ring.
7. If the pump seems to be running properly, increase the
rpm to 1500 to 1800 rpm for one to two minutes while
operating no hydraulic functions. Repeat checks in steps
4, 5, and 6.
8. Increase engine speed in steps to full RPM. Repeat
checks in steps 4, 5, and 6.
9. Cycle the components the pump section powers to verify
the pump section drives them properly. Verify there is no
leaking.
10. Check pressure settings. Refer to Pressure Setting
Procedures, page 2-24 in this section.
No. 2 Pump Removal
Absolute cleanliness is essential when working on the
hydraulic pumps. The presence of dirt and foreign
materials in the system can result in serious damage or
inadequate operation.
Published 01-29-2014, Control # 496-00
TMS800E SERVICE MANUAL
CAUTION
CAUTION