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SERVICE
&
MAINTENANCE INSTRUCTIONS
HYDRAULIC PUMP REPAIR
(Figure
32)
Pump repair is limited to seal replacement.
DISASSEMBLY
1.
Remove key
(7)
from shaft.
2.
Clean outside of pump thoroughly.
3.
Clamp pump in vise,
shaft
up.
4.
Remove tie bolts
(1
6),
four each.
5.
Remove tie bolts
(1
7), four each.
6.
Use sharp tool to mark across front plate, body
and back plate. This will assure proper
reassembly.
123
7.
Remove pump from vise, hold pump in hands
and bump shaft against a wooden block to
separate front plate
(14)
from back plate
(1).
Body
(4)
will remain with either front plate
or
back plate.
8.
To separate body from section it remains with,
place drive gear
(6)
in bearing and tap
protruding end with plastic hammer.
9.
Remove thrust plate.
(3)
from back plate.
10.
Remove O
-
ring
(2)
from back plate.
11.
Remove O
-
ring
(2)
from front plate.
12.
Remove .,diaphragm
(8)
from front plate by
13.
Lift springs
(1
2)
two
each, and steel balls
(13)
14.
Lift back
-
up gasket
(9)
and protector gasket
15.
Lift diaphragm seal
(1 1)
from front plate.
16.
Remove shaft seal
(1
5)
from plate.
prying with sharp tool.
two
each, from front plate.
(1
0)
from front plate.
456
8
910
11
2
I
18
i
0
12
13
14
15
16
I-'
-
17
1. Back plate assembly
7.
114
x
114
x
15/16 Key
13. Steel ball
2. O-Ring
8.
Diaphragm
14. Front plate assembly
3. Thrust plate
9.
Back-up gasket
15. Shaft seal
4.
Body
10.
Protector gasket
16.
Tie
bolt
5.
Dowel pin
11. Diaphragm seal 17. Tie
bolt
6.
Drive gear assembly 12. Spring 18. Idler gear assembly
Figure
32.
Pump Assembly
43
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