Repair
3A5266G
15
4. Pry the pump cylinder (11) out of the pump base (2)
. 17).
NOTE:
Be careful not to scratch or damage the
outside surface of the pump cylinder and/or inside
cavity of the pump base (2) when removing the
pump cylinder
5. Remove o-ring (6) from shovel seal retainer (10).
6. Remove pump cylinder (11) and piston rod assem
-
bly from pump base (2) casting.
7. Inspect H-wiper seal (3) for damage and wear. If it
is damaged and/or worn, remove it from pump
base (2) (F
. 19).
8. Remove seal retainer (9) from pump base (2).
Remove u-cup seal (4), o-ring (6) and bearing (5)
from seal retainer (F
9. Separate the piston rod assembly from pump cylin
-
der (11).
10. Remove the spring pin (20) securing the piston rod
(19) to the shovel rod (12). Unscrew the piston rod
to separate if from the shovel rod (F
. 20).
11. Remove intake seal (17) from shovel rod (12).
12. Remove o-ring (7) from shovel seal retainer (10).
13. Unscrew alignment rod (13) to separate it from the
piston rod (19).
NOTE:
- It may be easier to separate the two parts by
clamping the piston rod in a vise. Take care
when clamping the rod in a vise to not
over-tighten the vise around the rod which
could damage the rod or scratch the outside
surface. Clamp only on recessed surface of
piston rod (19).
- If using a vise, to prevent the rod from rotating
while separating the two parts, insert a pin that
is longer than the spring pin (20) through the
pin holes.
14. Remove the piston seal (18) from piston rod (19).
15. Remove shovel seal retainer (10) from the shovel
rod (12).
16. Remove u-cup seal (4), bearing (5) and two o-rings
(6) from the pump cylinder (11).
17. Clean and inspect all parts for scratches and or
scoring. If damage is found or a loss of perfor
-
mance was noted during pump operation, replace
parts.
F
IG
. 17
F
IG
. 18
F
IG
. 19
2
11
6
10
3
9
4 5
2
6
F
IG
. 20
NOTICE
Be careful when tightening piston rod in vise to not
crush, scratch or damage the outside surface of the
piston rod and/or alignment rod. A scratched or
damaged surface can create a leak path for fluid.
20
18
12
10
6 7 17
13
19
