INSTALLATION 1400H OPERATOR AND SERVICE MANUAL
7-8 Published 10-30-2014 Control # 040-09
damage to the pump or other components in the hydraulic
system.
1. Install pump on PTO following procedures described
under “Initial Pump Installation” on page 7.
2. Fill the reservoir with hydraulic oil.
3. Open the shut-off valve on the hydraulic line from the
reservoir to the pump.
4. Fill the pump housing with hydraulic fluid. Pour the oil
directly into the upper most case drain port.
5. Fill the inlet lines from the pump to the reservoir with
hydraulic oil. Fill all outlet lines from each pump section
with hydraulic oil and reconnect hoses.
NOTE: This can be done before pump installation. Simply
remove the cap on the outlet of pump and fill with
oil. Reinstall cap and install pump.
6. Check the lines for properly tightened fittings, and be
certain it is free of restrictions and air leaks. Inspect the
case drain line for leaks and restrictions.
7. Install a gauge at the pump pressure gauge port on the
Main Directional Control Valve Manifold.
8. Start the and idle the engine with PTO engaged while
monitoring the pressure gauge for two or three minutes.
Do not operate any hydraulic levers.
9. Check the temperature of pump by carefully laying hand
on the pump sections.
10. All pumps should be the same temperature. It depends
on the pressure drop across the circuits which could
vary. If the pump does not build up pressure to 13 to
34 bar (200 to 500 psi), shut down the engine and take
corrective action.
11. If pump makes excessive noise it is probably sucking air
into the inlet keeping the pump from priming. If this
occurs, stop engine and inspect all connections of
suction hose.
12. Operate the system under a light load for 5 to 10
NOTE: Pay attention to the service brake charge pump on
cranes with the dual accumulating charging valve
for hydraulic service brakes. If the dual
accumulator charge is set to high the pump will
push all the flow across an integral relief valve that
dumps the heated flow back into the inlet pump.
This will cause overheating of pump section above
the hydraulic reservoir temperature. If this occurs
stop the engine and adjust the dual accumulator
charging valve, located in the tank port or turn
CCW to lower the pressure.
13. Re-start the engine and check for the dual accumulator
charge valve to cycle on and off with a one to two
second charge cycle.
14. Increase rpm to 1500-1800 for 1-2 minutes with no
functions actuated. and recheck.
15. Incrementally increase throttle to full rpm and cycle the
functions supplied by pump.
CAUTION
The supply line shut-off valve must be open to allow flow
to the pump to prevent pump damage.
CAUTION
Pump could be extremely hot and could result in serious
injury.
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