4
4000 Series Char-Lynn Motors
Disassembly
Cleanliness is extremely important when repairing a hydraulic motor.
Work in a clean area. Before disconnecting the lines, clean port area of
motor thoroughly. Use a wire brush to remove foreign material and
debris from exterior joints of motor. Check shaft and keyway. Use
600 grit paper/cloth to remove all nicks, burrs, and sharp edges that
might damage the shaft seals when installing retainer on shaft and
bearing assembly. Before starting disassembly procedures, drain oil
from inside of motor.
1 Place motor in a vise with output shaft down. Clamp across edge
of mounting flange, not on housing (see Figure 1). Excessive
clamping pressure will cause distortion. When clamping, use some
protective device on vise, such as special soft jaws, pieces of hard
rubber or board.
Although not all drawings show the motor in a vise, it is recom-
mended that you keep the motor in the vise during disassembly.
Follow the clamping procedures explained throughout the manual.
2 Remove 4 bolts from the valve housing.
3 Lift valve housing straight up. If done carefully, the springs and
balance ring subassembly will remain on valve for easy removal.
4 Carefully remove the following from the valve housing:
1 seal, 82,3 mm [3.24 inch] I.D.
1 seal, 8,9 mm [.35 inch] I.D.
2 check valve plug assemblies (plug, seal, spring, ball) 1 plug (case
drain) with seal.
5 Remove 2 balance ring springs.
6 Remove balance ring subassembly.
7 Remove inner and outer face seals from the balance ring.
8 Lift off valve.
Figure 1
Figure 2
Plug
Assembly
Valve
Housing
Check
Plug
Assembly
Seal
Seal
Figure 3
Spring
Balance Ring
Valve
Figure 4
Inner
Face
Seal
Outer Face Seal
Summary of Contents for Char-Lynn 4000 Series
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