Shaft, Seal, And Bearing - JLG 1850SJ Service And Maintenance Manual

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Table of Contents

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS

CONTROL SOLENOIDS REMOVAL

1. Disconnect electrical connection and remove the three

cap screws (D050) using a 4.mm internal hex wrench.

2. Remove the solenoid (D025) and O-ring (D025A). Dis-

card the O-ring.

3. If necessary, remove the coil using a 12 point 26 mm

CONTROL SOLENOIDS INSPECTION

1. Inspect the machined surface on the control. If you find

any nicks or scratches, replace the component.

CONTROL SOLENOIDS REASSEMBLY

1. Lubricate new O-ring (D025A) using petroleum jelly and

2. Install solenoid with three cap screws (D050) using a 4

mm internal hex wrench. Torque screws to 5 Nm [4 lbft].

3. Install coil using a 12 point 26 mm socket. Torque coil

nut to 5 Nm [3.7 lbft].

4. Reconnect electrical connections and test the pump for

proper operation.

Shaft, Seal, and Bearing

The front pump input shaft assembly is serviceable without

disassembling the pump, the rear shaft is not. Orient the

pump on the work surface so the shaft is pointing to the side.

1. Unwind the spiral ring (J300) from the housing to

release the shaft/seal/bearing subassembly.

2. Pry on the lip of the seal carrier (J275) to remove it from

the pump. Remove the seal carrier. Remove and discard

O-ring (J260). Press the seal (J250) out of the carrier and

3. Pull the shaft (J100) with bearing (J150) out of the

pump. If necessary, tap lightly on the shaft to dislodge it

from the cylinder block. C

DO NOT DAMAGE THE HOUSING BORE, SHAFT OR BEARING WHEN REMOV-

ING THE SHAFT AND BEARING.

4. Remove the retaining ring (J200) using retaining ring

pliers. Press the bearing off the shaft.

Figure 5-135. Shaft Assembly