Service Manual
Series 45 J Frame Open Circuit Axial Piston Pumps
520L0607
• Rev AI • Sep 2013
25
Minor Repair (continued)
LS and PC Controls
Control assembly
LS control shown; parts C104 through C106 and
C112 through C118 are not used on PC control
Disassembly
1. Remove the 4 screws (C300) holding the
control housing onto the end cap.
2. Remove the control and discard the 4
interface O-rings (C200).
3. Remove the PC set screw (C102), PC adjusting
plug (C138), O-ring (C138A), springs (C134,
C135), and seat (C133). Discard the O-ring.
4. Remove the plug (C103), O-ring (C103A), and
PC spool (C132) from the control housing.
Discard the O-ring. Note orientation of the
spool for reassembly.
For PC only controls, skip steps 5 through 7
5. Remove the plug (C105) and O-ring (C105A),
or the plug (C106) and O-ring (C106A). Discard
the O-ring (C105A or C106A).
6. Remove the LS set screw (C102), LS adjusting
plug (C118), O-ring (C118A), back-up rings
(C118B), springs (C114, C115), and seat (C113).
Discard the C118A O-ring.
7. Remove the C104 plug, C104A O-ring, and
C112 LS spool from the control housing;
discard the O-ring. Note orientation of the
spool for reassembly.
Inspection
8. Inspect the adjusting plugs for wear at the tips and where they contact the springs; replace as
necessary.
9. Inspect the springs and spring guides for wear or damage; replace as necessary.
10. Carefully inspect the spools. Ensure the sealing lands are free of nicks and scratches. Check the
ends that contact the spring guides for wear. Replace spools as necessary.
11. Inspect the control housing for damage. Check the spool bores for excessive wear.
12. Clean all parts and lubricate spools, springs, guides and new O-rings with clean hydraulic fluid.
C118
C118B
C118B
C118A
C114
C115
C113
C112
C104
C103
C132
C133
C105
C106
C106A
C135
C134
C138A
C138
C102
C200
C103A
C104A
E101 226
C300
3
/
16
inch
10.8 - 13.5 N•m
[8 - 10 lbf•ft]
3
/
16
inch
10.8 - 13.5 N•m
[8 - 10 lbf•ft]
3
/
16
inch
10.8 - 13.5 N•m
[8 - 10 lbf•ft]
3
/
16
inch
10.8 - 13.5 N•m
[8 - 10 lbf•ft]
6 mm
7.5 - 10.8 N•m
[5.5 - 8 lbf•ft]
4 mm
5.4 - 7.5 N•m
[4 - 5.5 lbf•ft]
C105A