Manitowoc Grove YB5515 Service Manual

GROVE Published 10-21-2010, Control# 198-04 4-49
5540F/YB5515 SERVICE MANUAL HYDRAULIC SYSTEM
4
Installation
1. Position the valve assembly on the mounting plate and
secure with three bolts, washers and nuts.
2. Connect the hydraulic lines to the control valve.
3. Start the engine and release the air captured in the
hydraulic lines, by operating each hydraulic function
several times in each direction.
4. Check for leaks and fill the hydraulic reservoir if
required.
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.
Disassembly
1. Place the motor in a vice and clamp across the edges of
the flange Figure 4-48 with the output shaft facing down.
When clamping use protective devices on the jaws, such
as soft jaws, pieces of rubber or wood.
NOTE: Although not all drawings show the motor in a vice,
it is recommended that you keep the motor in the
vice during disassembly and assembly. Follow the
clamping procedure explained in Step 1.
2. Remove seven capscrews 19 Figure 4-49 and seal
washers 18.
3. Remove end cap 17. Remove and discard seal 13 from
the end cap.
4. Remove gerotor 16. Remove and discard seal 13 from
the gerotor.
5. Remove drive shaft 14.
6. Remove spacer plate 15.
7. Remove seal 13 from housing 10.
8. Remove output shaft 9 from housing 10.
9. Remove needle thrust bearing 8 from shaft or housing.
10. Reposition the motor in the vice. Clamp across ports
Figure 4-50. DO NOT clamp on housing. Excessive
clamping pressure on side of housing causes distortion.
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.
CAUTION
Cleanliness is extremely important when repairing the
swing motor. Work in a clean area. Plug the ports then use
a wire brush to remove foreign material and debris from
around the external joints of the motor. Check the shaft
and key slot, remove all nicks, burrs or sharp edges that
might damage seals during installation. Before starting
the disassembly procedures, drain any remaining oil from
inside the motor.
a0763
FIGURE 4-48
Reference Only

Manitowoc Grove YB5515 Specifications

General

Brand	Manitowoc
Model	Grove YB5515
Category	Construction Equipment
Language	English