JLG 1850SJ Service Manual - Manual (Page 272)

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
5-102 – JLG Lift – 3121619
LS C ONTROL ASSEMBLY
1. Hold control in a horizontal position. Install spherical
end of LS spool (41) in LS bore. Install new 0-ring (48) on
LS Plug (50). Install LS plug and torque to 8 - 10 ft-lb
(10.8 - 13.5 Nm). Place inner LS spring (46) and outer LS
spring (47) on LS spring guide (45). install in LS bore.
Place a new 0-ring (C116) and back-up rings (C117) onto
the LS adjustment screw (C118).
2. Install LS plug assembly so it sits one turn below surface
of control housing. Install and torque set screw to (C1
02) 5.5 - 8.0 ft-lb (7.5 - 10.8 Nm). Install plugs (C105, C1
06) with new 0-rings. Torque plugs to 8 - 10 ft-lb (10.8 to
13.5 Nm).
3. Adjust PC and LS spools to proper setting according to
tag nomenclature.
CONTROL ASSEMBLY INSTALLATION
1. Using petroleum jelly to retain them, install four new
seal rings (37) in control assembly (42) recesses.
2. Install control assembly (42) on endcap (34) with four
capscrews (43). Torque to 4.0-5.5 ft-lb (5.4 to 7.5 Nm) in
an alternating pattern. Re-torque the first screw for
proper torque retention.
3. Install coupling (32) on shaft (8).
35
38
41 51
52
53
54
44
45
46
47
48
49
50
36
39
40
39
40
40
39
55
42
39
Figure 5-137. Control Assembly
32
34
43
37
42
Figure 5-138. Control Installation