1.
See Figure 10. Remove tube line to cap.
2.
Remove maximum volume stop assembly (items 12, 13, 19, 20, 24).
3.
Remove cap assembly.
4.
Remove plug (15) and attached parts. Remove spring (11) and spool (18).
5.
Remove adj. plug (2) and attached parts. Remove seal piston (5). Note: a 10-24
screw may be attached to assist in pulling the piston. Remove spring (7) and cone (8).
6.
Do not remove sleeve in body (1). Sleeve is pressed into cap and finished to size.
If sleeve, snout or cap is worn, replace the cap-sleeve assembly (1).
7.
Examine seat (10) for wear. Do not remove unless damaged.
1.
Install Avseal plugs (9) in body. Install orifice (29) in body.
2. Press seat (10) into bore to shoulder in bore.
3. Install spool (18) into bore as shown. Install spring (11) over end of spool. Install
O-ring (6) on seal (16). Lubricate and install into plug (15). Install O-rings (13) and (14)
on plug (15). Install plug (15) into cap. Install screw (3), nut (4) and acorn nut (17).
4. Install O-ring (6) on seal piston (5).
5. Lubricate O-ring and install cone (8), spring (7) and seal piston into bore in cap (1),
being careful that cone enters seat (10).
6. Install remaining parts. Torque plug (12) to 68 Nm. Torque plug (21) to 35 Nm.
7. Note proper location for cap on pump. Install O-rings on interface between cap and
pump control pad.
8. Install cap assembly on pump, guiding the control piston into the bore.
9. Torque mounting bolts to 102 Nm.
10. Install tube fitting and tube line connecting to opposite cap.
Compensator is to be tested on pump. Adjust maximum volume stop to full displace-
ment.
1. Install gages on system pressure and on compensator vent ports.
2. Turn compensator adjustment screw (23) CCW until there is no contact with spring,
then adjust 1/2 turn CW after contact is made with spring.
3. Turn differential adjustment screw (3) CCW until there is no contact with spring,
then adjust 1/2 turn CW after contact is made with spring.
4. Start prime mover with system relief valve set at 35 bar. Apply a load to the pump.
5. Set pump control to full displacement. Pump should go to full displacement at 35
bar.
6.
Increase system relief valve until compensator de-strokes pump to zero displace-
ment. Set compensator to 103 bar.
7. Adjust compensator differential spool pressure to 13,8 bar. This is accomplished by
adjusting the differential screw until the difference in pressure readings between the sys-
tem pressure and compensator vent gages installed in the compensator cap is 13,8 bar.
(It may be necessary to change differential to gain stability. Use caution when exceeding
17 bar to avoid spring going solid, preventing compensator action.)
8. Set the compensator to 207 bar, 414 bar, and 500 bar.
9. At each condition, increase the system pressure until the pump fully de-strokes. At
no time should the system pressure vary more than 10,3 bar from the compensator set-
ting. The control should be steady and stable at all conditions.
10. Reduce pressure to 10,3 bar below the compensator setting. Pump should return to
full stroke. Repeat two or more times. Compensator setting should be repeatable.
11. Set compensator adjustment to the required setting, or 414 bar if not otherwise
noted.
ELECTRIC STROKER
COMPENSATOR OVERRIDE
DISASSEMBLY
ASSEMBLY
TEST AND ADJUSTMENT
20
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