1. See figure 11. Remove 2 screws holding body (16) to cap assembly (1).
2. Remove all parts from body (16) except pin (30) and arm assembly (28). It is not
necessary to remove these parts unless broken or worn. Examine parts for wear or
damage.
3. Remove screw (3). Examine head for excessive wear, and body for smooth sealing
surface with O-ring.
4. See figure 6. Remove tube lines to cap assembly.
5. Remove screws holding cap assembly to pump body.
6. Remove cap assembly (1). Remove plug (3) with attached parts. Remove spring
(12) and spool (4).
7. Do not remove sleeve in body (1). Sleeve is pressed into cap and finished to size.
If sleeve or cap is worn, replace the cap-sleeve assembly (1).
8. Remove screw (14) and nut (15). Push a rod through the cap to remove the
retainer (12).
1. See figure 6. Install Avseal plug (6) in cap.
2. Install spool (4) into bore as shown. Install spring (8) over end of spool.
3. Install O-ring (13) on spring retainer (12). Install retainer (12), screw (14), and nut
(15) in plug (3).
4. Install O-rings (7) and (16) on plug (3). Install plugs (3) and (9) in body (1). Torque
plugs to 60 Nm. Install O-ring (5) in cap.
5. Turn screw (14) in until spring retainer (12) contacts spring (8). Turn an additional 1-
1/2 turns and lock in position.
6. Note proper location for control on pump. Install O-rings on interface between cap
and pump control pad. Install cap on pump control pad, guiding the control piston into
the bore.
7. Torque two assembly bolts to 102 Nm.
8. See figure 11. Apply Loctite
®
on threads of screw (3), lubricate the shank, thread
through the cap into the control piston, and torque to 6,78 Nm.
9. Install minimum stop screw (24) and turn clockwise to stroke pump to full volume.
Measure height from control cap to top of screw (3). With control piston at full stroke,
dimension must be 11,4 +/- 0,76 mm. Back out minimum stop screw (24) till there is no
contact with control piston.
10. Press dowel (30) into body (16), through the link (28), to 6,35 mm below surface.
Apply Loctite
®
to threads of screws (40) and install over dowel (30).
11. Press spool (21) into retainer (19). Caution: do not use excessive force. Place
spool/ retainer assembly into spool (17) with spring (18) and washer (34). Secure with
retaining ring (33).
12. While sleeve (27) is engaged into dowel on link (28), slide above spool assembly
into bore of body (16), and through sleeve (27). Spool (21) must move freely and easily
at all positions of the link (28).
13. Assemble all other components into body (16) per above drawing. Torque plug (12)
to 122 Nm.
14. While spring retainer is engaging clevis pin (5) under dowel of link (28), slide the
other opening of spring retainer over the top of the screw (3). Attach body assembly
(16) to cap (1) with two screws and torque to 103 Nm.
1. Plumb 82,8 bar servo supply to control.
2. Thread zero screw (24) so that pump is on stroke.
3. Start pump.
4. Supply 20,7 bar to hydraulic stroker control port.
5. Adjust screw (9) until output flow is at the full stroke position. Lock in place.
6. Reduce control pressure to 0 bar. Back out zero screw (24) until pump is at zero
stroke. Lock in place.
7. Increase and decrease control pressure between 0 and 20,7 bar several times at
approximately 34,5 bar, 207 bar, and 414 bar system pressure. Pump stroke should
follow control pressure smoothly and proportionally. Full to zero or zero to full stroke
should be achieved in no more than .5 second. Full stroke should be achieved at 19
+/- 1 bar. Zero stroke should be achieved at 3,45 +/- 1 bar. Adjust control pressure up
to 12 bar from zero stroke, then adjust down from full stroke to 12 bar. The flows at the
two settings shall not vary more than 15 l/m from each other.
HYDRAULIC STROKER
HYDRAULIC STROKER
DISASSEMBLY
ASSEMBLY
TEST AND ADJUSTMENT
23
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