Piston (Traction) Pump Service
40
to 48 in--lb
4
(5
to 6 ft--lb
to 8 N--m)
(4.5 to 5.4 N--m)
4
4.5 to 5.4 N--m)
0 to 48 in--lb
100 to 110 ft--lb
(136 to 149 N--m)
25
to 28 ft--lb
(
(34
to 38 N--m)
40
48
4
7
41
35
49
33
46
4
3
42
1
5
30
14
37
31
44
27 to 31 ft--lb
32
(37
to 42 N--m)
27
45
36
38
39
34
12
23
10
2
1
22
20
9
19
25
8
28
29
27
24
10
1
26
18
17
11
5
100
(136
to 110 ft--lb
to 149 N--m)
12
6
13
14
7
150 to 160 in--lb
(17 to 18 N--m)
1
5
16
6
40
(4.5
to 48 in--lb
to 5.4 N--m)
4
5
3
2
Figure 63
1.
Drive shaft
Retaining ring
Shaft seal
Washer
Retaining ring
Thrust bearing race
Thrust bearing
Bearing
Housing
Seal set
Servo piston
Gasket
Cover plate
Flat washer (4 used per cover)
Socket head screw (4 used per cover)
Washer
Jam nut
18. Seal washer
19. Plug
20. O--ring
34. Flat washer (4 used)
35. Manual servo control assembly
36. Cap screw (4 used)
37. Control orifice (.036)
38. Backplate
39. Roll pin
40. Housing gasket
41. Rotating kit
2.
3.
4.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
Cradle
Bushing
Screw
Valve plate
Bearing
Reverse relief valve
O--ring
O--ring
Bypass valve
Forward relief valve
5.
6.
7.
8.
9.
42. Camplate
10.
11.
12.
13.
14.
15.
16.
17.
43. Servo piston follower
44. Cap screw (2 used)
45. Bushing dowel (2 used)
46. Socket head screw (6 used)
47. Control arm
48. Hex nut
49. Lock washer
31. Cover plate
32. Housing gasket
33. Control orifice (.028) (2 used)
NOTE: For service of the piston (traction) pump, see
the Eaton Model 72400 Servo Controlled Piston Pump
Repair Information at the end of this chapter.
Hydraulic System
Page 4 -- 78
Groundsmaster 4500--D/4700--D
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