JLG 1850SJ, Service And Maintenance Manual, Page: 409 / 712

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
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NOTE: To insure proper pump operation, it is extremely important
to ensure that there is no contamination between the end-
cap and valve plate.
11. Install the bearing cone (B020) onto the shaft. Using
assembly grease to hold the seal (K060), install the end-
cap to the housing. Ensure that seals remain properly
seated and are not pinched during assembly. With a 10
mm internal hex wrench, install and torque endcap
screws at 127 to 155 Nm [94.to.114.lbft], using the criss
cross pattern. Retorque the first screw to ensure proper
torque retention.
12. Lubricate the lip of the new shaft seal (K020) with clean
hydraulic fluid. Place a protective sleeve over the shaft
end to prevent damage to the seal during installation.
Keeping the seal perpendicular to the shaft, press the
new seal into the housing just far enough to clear the
retaining ring groove. Install seal with the cupped side
toward the shaft bearing. Do not damage the seal dur-
ing installation. Using the appropriate snap ring pliers,
install the seal retaining ring (K010). Remove the instal-
lation sleeve.
13. Clean all control parts and cover with a light coating of
hydraulic fluid prior to reassembly.
14. Install the spherical end of the PC spool (C132) into the
PC bore (refer to illustration). Install the PC plug (C103)
using a new O-ring (C103A). Torque at 10.8 to 13.5 Nm
[8.to.10.lbft]. Place the two PC springs (C134, C135) onto
the PC spring guide (C133) and install into the PC bore.
Place a new O-ring onto the PC plug and install it so that
it sits one turn below the surface of the control housing.
Install and tighten set screw (C102) at 7.5 to 10.8 Nm [5.5
to 8.0 lbft] to retain the adjusting plug.
K060
J020
J030
10 mm
127 to 155 N·m
[94 to 114 lbf·ft]
B020
K020
K010
C103A
C132
C133
C135
C134
C136
C138
C102
7.5 to 10.8 N•m
[5.5 to 8.0 lbf•f t]
10.8 to 13.5 N•m
[8.0 to 10.0 lbf•f t]
C103