Control; Disassembly; Inspection - Sauer Danfoss 45 Series Service Manual

ContRoL

Series 45 G Frame Open Circuit Axial Piston Pumps
Service Manual
Minor repair

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 seat;
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.
520L0605 • Rev AB • December 2010
Control assembly
C104
I 3
/ inch
16
t10.8 - 13.5 N•m
[8 - 10 lbf•ft]
dC104A
RC112
e
C300
I4 mm
t5.4 - 7.5 N•m
[4 - 5.5 lbf•ft]
d
C200
dC106A
C133
C106
I 3
/ inch
C135
16
t10.8 - 13.5 N•m
[8 - 10 lbf•ft]
C134
C138A
C113
C115 C138
C114
dC118B
dC118A
dC118B
iC118
Ls control shown; parts C104 through C106 and
C112 through C118 are not used on PC control
C103
I 3
/ inch
16
t10.8 - 13.5 N•m
[8 - 10 lbf•ft]
d
C103A
R
C132
e
C105
I 3
/ inch
16
t10.8 - 13.5 N•m
[8 - 10 lbf•ft]
dC105A
C102
I6 mm
t7.5 - 10.8 N•m
[5.5 - 8 lbf•ft]
d
i
E101 226
25