SECTION 3 - CHASSIS & TURNTABLE
3-50
– JLG Lift –
3120746
4. Remove the piston (15) from the power plate (21) by
introducing low pressure air into the hydraulic inlet
and make sure the piston is directed away from the
operator. Remove the o-rings (17&19) and backup
rings (16 & 18) from the piston O.D. and I.D.
grooves. Do not remove backup rings (16 & 18)
unless replacement is necessary because they will
be damaged.With shaft protrusion downward,
remove end cover (13) by removing capscrews (12).
Inspection
1. Clean all parts thoroughly.
2. Closely inspect all parts for excessive wear, cracks
and chips. Replace parts as necessary.
3. Discard seals and o-rings.
4. Closely inspect bearings and bearing contact sur-
faces. Replace as necessary.
Assembly
THERE MAY BE MORE PARTS IN A SERVICE KIT THAN YOUR
BRAKE REQUIRES. CHECK THE PARTS LIST CAREFULLY FOR
THE EXACT QUANTITY. IN THE CASE OF SPRINGS, SPACE THE
SPRINGS AS SHOWN IN THE FIGURE.
1. Worn o-rings and damaged or worn Teflon backup
rings must be replaced prior to assembly.
2. The cylinder of the power plate, piston, and o-rings
must be clean prior to assembly and pre-lubed with
the system hydraulic fluid.
THE DEPTH THE PISTON IS INSTALLED INTO THE POWER PLATE
IS CRITICAL. THE SURFACE OF THE PISTON AT THE CUTOUTS
MUST BE FLUSH TO 0.120 IN BELOW THE SURFACE OF THE
POWER PLATE. DO NOT EXCEED THE 0.120 DEPTH OR THE PIS-
TON WILL COCK RESULTING IN A COMPLETE LOSS OF BRAK-
ING.
3. Assemble the piston (15) into the power plate (21)
using a shop press, being careful not to damage the
o-rings or Teflon back-up rings. Visually align the
center of the cutouts in the piston with the torque pin
(3) holes in the power plate (21).
4. For replacement of the seal;
a. Use a shop press to install the bearing (4) into
the housing. Press on the outer surface of the
bearing only. Install the retaining ring (5) into the
groove.
b. Press the seal (6) into the housing (1) until it is
flush with the face of the housing. The lip of the
seal must face towards the bearing.
5. Press the shaft into the housing until it stops on the
bearing. Support the inner race of the bearing dur-
ing the press operation.
6. Rotating discs must be clean and dry. The lining
material and mating surfaces of the stationary discs
must be thoroughly clean and free of debris. Worn
or scored rotating discs must be replaced.
7. Install bolts (24) with washers (23) in the power plate
(21). Tighten sequentially, one turn at time, until the
power plate is properly seated. Torque 105 to 115
foot-pounds.
Summary of Contents for 601S
Page 1: ...Service and Maintenance Manual Model 601S P N 3120746 November 22 2016 ...
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Page 26: ...SECTION 1 SPECIFICATIONS 1 10 JLG Lift 3120746 Figure 1 3 Torque Chart ...
Page 36: ...SECTION 2 GENERAL 2 10 JLG Lift 3120746 Figure 2 7 Connector Installation ...
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Page 49: ...SECTION 3 CHASSIS TURNTABLE 3120746 JLG Lift 3 9 Figure 3 1 Torque Hub Drive Fairfield ...
Page 51: ...SECTION 3 CHASSIS TURNTABLE 3120746 JLG Lift 3 11 Figure 3 2 Torque Hub Drive Auburn Gear ...
Page 53: ...SECTION 3 CHASSIS TURNTABLE 3120746 JLG Lift 3 13 Figure 3 3 Drive Brake Assembly Ausco ...
Page 91: ...SECTION 3 CHASSIS TURNTABLE 3120746 JLG Lift 3 51 Figure 3 40 Swing Brake Assembly Ausco ...
Page 99: ...SECTION 3 CHASSIS TURNTABLE 3120746 JLG Lift 3 59 ...
Page 119: ...SECTION 3 CHASSIS TURNTABLE 3120746 JLG Lift 3 79 Figure 3 46 EFI Component Location ...
Page 122: ...SECTION 3 CHASSIS TURNTABLE 3 82 JLG Lift 3120746 Figure 3 47 ECM EPM Identification ECM EPM ...
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Page 132: ...SECTION 4 BOOM PLATFORM 4 4 JLG Lift 3120746 Figure 4 5 Boom Assembly Cutaway Sheet 1 of 2 ...
Page 133: ...SECTION 4 BOOM PLATFORM 3120746 JLG Lift 4 5 Figure 4 6 Boom Assembly Cutaway Sheet 2 of 2 ...
Page 145: ...SECTION 4 BOOM PLATFORM 3120746 JLG Lift 4 17 Figure 4 22 Rotator Assembly Helac ...
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Page 174: ...SECTION 5 HYDRAULICS 5 26 JLG Lift 3120746 This page left blank intentionally ...
Page 176: ...SECTION 6 JLG CONTROL SYSTEM ADE 6 2 JLG Lift 3120746 Figure 6 1 EPBCS Block Diagram ...
Page 238: ...SECTION 7 SCHEMATICS 7 16 JLG Lift 3120746 Figure 7 15 Hydraulic Schematic Sheet 1 of 4 ...
Page 240: ...SECTION 7 SCHEMATICS 7 18 JLG Lift 3120746 Figure 7 17 Hydraulic Schematic Sheet 3 of 4 ...
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