Disassembly
Pump
1
Place pump into vise.
2
Remove dipstick (
31
).
3
Drain crankcase oil from crankcase.
4
Remove housing cover screws (
33
)
(
† Fig. 6
).
5
Remove housing cover (
35
) and
gasket (
36
).
6
Loosen and remove three jam
nuts (
74
) from electric motor (
66
)
(
† Fig. 6
).
7
Remove electric motor (
66
) mounting
screws (
64
) with lock washers (
65
).
8
Remove electric motor (
66
).
9
Remove motor o-ring (
73
).
10
Refer to
Fig. 7
and remove gear box
mounting screws (
71
), washers (
72
) and
gear box (
76
).
11
Loosen and remove screws (
67
) holding
first stage gear set (
68
), spacer (
69
) and
final stage gear set (
70
) in place.
12
Remove first stage gear set (
68
),
spacer (
69
) and final stage gear set (
70
)
from gear box.
13
Remove shaft adapter (
75
).
14
Remove gear box o-ring (
38
).
15
Loosen screws (
44
) holding shaft
cover (
46
) on pump housing (
37
)
(
† Fig. 8
).
16
Remove retaining ring (
48
) from pump
shaft (
40
).
17
Remove pump shaft (
40
) by pushing
pump shaft on retaining ring (
48
) side.
67
68 69 70
73 71
72
76 38
37
75
7
44
45
46
48
40
52
53
54
55
60
61
63
62
59
58
57
56
24
Remove shovel plug (
62
) from housing
tube (
60
).
25
Remove spiral retaining ring (
61
).
26
Loosen and remove tube housing (
60
)
(
† Fig. 9
).
27
Remove bronze bearing (
56
) from tube
housing (
60
).
28
Remove o-ring (
57
) from
tube housing (
60
).
29
Remove back up washer (
58
) from tube
housing (
60
).
30
Remove o-ring (
59
) from
tube housing (
60
).
31
Tap on crank rod (
7
) inside housing (
37
).
32
Pull eccentric (
5
) and crank rod (
7
)out of
top of pump housing (
37
).
18
Remove outlet pin nut (
55
) from pump
housing (
37
).
19
Remove o-ring (
54
) from groove in out-
let pin nut (
55
).
20
Remove back up washer (
52
) from outlet
pin nut (
55
).
21
Remove o-ring (
53
) from outlet
pin nut (
55
).
22
Repeat
steps 18 - 21
for remaining
outlet pin nut (
55
) on opposite side
of pump.
23
Remove retaining ring (
63
) from housing
tube (
60
). Refer to
Fig. 9
.
Fig. 6
Fig. 7
Fig. 8
Fig. 9
NOTE
Slight force may be necessary to remove
eccentric (
5
) and crank rod (
7
) from
housing (
37
).
31
33
34
35
36
37
74
64, 65
66
72
71
8
