Manitowoc Grove GRT9165, Руководство по обслуживанию

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2-17
GROVE
GRT9165 SERVICE MANUAL HYDRAULIC SYSTEM
2
Published 10-01-2020 Control # 699-00
3. Apply Loctite® 243 or equivalent to the threads of the
capscrews. Install pump and gasket on drive pad with
capscrews and washers. Make sure the splines mesh
properly.
4. Torque capscrews to recommended torque.
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.
Piston Pump Start-up Procedure
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 the case drain hose and adapter from the “DR”
port Figure 2-5 on both pumps and fill the housing with
the same hydraulic fluid that was used to fill the
hydraulic reservoir to the bottom of the o-ring case drain
port. Re-install the case drain adapter and hose running
to the hydraulic reservoir.
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.
5. Place your hand on the pump to check for excessive
heat buildup caused by binding or other problems. If the
pump is too hot to keep a hand on, stop the engine.
6. Listen for abnormal noises indicating low hydraulic fluid
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 sections power to verify
the pump sections drive them properly. Verify there is no
leaking.
CAUTION
Do not feed hot hydraulic fluid into a cold pump. This may
cause the pump to seize.
CAUTION
Do not feed hot hydraulic fluid into a cold pump. This may
cause the pump to seize.
FIGURE 2-5
Pump Case
Drain Hose to
Reservoir