GROVE Published 1-20-2017, Control# 483-02 4-23
CD5515-2/YB5515-2 SERVICE MANUAL HYDRAULIC SYSTEM
Pump Start-up
1. Start the engine and let it idle. Do not allow the engine to
surge or run excessively fast during the initial start-up.
DO NOT OPERATE ANY HYDRAULIC FUNCTION AT
THIS TIME.
2. Let the pump run for about 60 seconds to release any air
that might be in the hydraulic system. Check the suction
hose connections for loose clamps, fittings, etc.
3. Adjust the pump to deliver system pressures. Follow the
instruction under Checking and Adjusting Hydraulic
Pressure Settings, page 4-15.
4. Check the level of hydraulic oil in the hydraulic oil tank. If
low, add only pre-filtered hydraulic oil.
NOTE: The variable displacement pump and all other
components require clean, filtered hydraulic oil for
proper operation. Contaminated hydraulic oil may
cause damage to the pump and other components.
Before adding any oil to the hydraulic tank, be sure
it is filtered through a 10 micron (absolute) or less
filter.
Outrigger Control Valve
Removal
1. Stop the engine and engage the parking brake. Place
chocks under the wheels.
2. Disconnect the battery using the battery disconnect
switch.
3. Remove the access cover over the control valves.
4. Individual valve sections can be removed from the
manifold block without removing the complete valve.
Disconnect the electrical leads from the outrigger valve
solenoids. Remove the four socket head capscrews
securing the valve section to the manifold block.
Remove the valve section.
5. If the complete valve assembly must be removed, tag all
hydraulic lines for correct assembly. Clean the valve and
connecting lines. Disconnect the hydraulic lines from the
valve ports. Put caps on lines to keep dirt out of the
hydraulic system. Remove the valve mounting screws
and remove the valve.
Solenoid Replacement
1. The solenoids on the valve section can be removed
without removing the valve section from the manifold
block.
2. Stop the engine and engage the parking brake. Place
chocks under the wheels.
3. Disconnect the battery using the battery disconnect
switch.
4. Open the access cover over the control valves and
remove the cover plate.
5. Disconnect the wire leads from the solenoid valve.
6. Remove the plastic nut from the solenoid shaft. Slide the
solenoid off of the shaft.
7. Place a new solenoid over the solenoid shaft and install
the plastic nut.
8. Connect the wire leads to the solenoid valve.
9. Connect the battery using the battery disconnect switch.
10. Start the engine and test outrigger function.
11. Install the cover plate and close the access cover.
Installation
1. If the complete valve assembly is being installed, put the
valve assembly in position and secure it with four
mounting screws. Connect the hydraulic lines to the
manifold block.
2. If only a valve section is being installed, place the valve
section in position and install the socket head
capscrews.
3. Connect the wire leads to the solenoid valves.
4. Connect the battery using the battery disconnect switch.
5. Start the engine and check the outriggers for correct
operation. Stop the engine, check for leaks and add
hydraulic fluid if necessary.
Swing Motor
Removal
1. Shut off the engine and release any hydraulic pressure
in the swing motor circuit by moving the control lever in
both directions.
2. Before disconnecting the hydraulic lines, clean the port
area of the swing motor thoroughly. Disconnect the
hydraulic lines from the swing motor. Put caps and plugs
on the lines and motor ports to keep dirt out.
3. Remove the two mounting bolts from the swing motor.
Remove the swing motor.
CAUTION
The swing motor can only be reached from under the
machine. Shut off the engine and remove the ignition key
to prevent accidental starting and moving of the crane
while working under it. Block all tires.
Reference Only
To Next Page
Loading...
Need help?
General
