Service Manual User Manual
Table Of Contents
- Service & Maintenance Manual
- Section A. Introduction - Maintenance Safety Precautions
- Section 1. Specifications
- 1.1 Capacities
- 1.2 Component Data
- 1.3 Performance Data
- Travel Speed
- Gradeability
- Turning Radius (Outside)
- Lift Speed - 400RTS
- Lift Speed - 500RTS
- Platform Capacity - Fixed Platform
- Platform Capacity - Traversing Platform Extension (If Equipped)
- Platform Capacity - Wide Deck, Dual Extensions (500RTS Only)
- Machine Weight
- Machine Height (Platform Lowered)
- Machine Length
- Machine Width
- 1.4 Lubrication
- 1.5 Lubrication Specifications
- 1.6 Pressure Settings
- 1.7 Limit Switches
- 1.8 Serial Number Locations
- 1.9 Cylinder Specifications
- 1.10 Major Component Weights
- 1.11 Critical Stability Weights
- Section 2. Procedures
- 2.1 General
- 2.2 Servicing and Maintenance Guidelines
- 2.3 Lubrication Information
- 2.4 Cylinders - Theory of Operation
- 2.5 Valves - Theory of Operation
- 2.6 Component Functional Description
- 2.7 Sliding Wear Pads
- 2.8 Pump Coupling Lubrication
- 2.9 Cylinder Checking Procedures
- 2.10 Cylinder Removal and Installation
- 2.11 Cylinder Repair
- 2.12 Tilt Alarm Switch
- 2.13 Pressure Setting Procedures - (400RTS)
- 2.14 Pressure Setting Procedures - (500RTS)
- 2.15 Drive Pump Start-up Procedure
- 2.16 Throttle Checks and Adjustments - Ford Engine
- 2.17 Throttle Checks and Adjustments - Deutz F3L1011
- 2.18 Oscillating Axle Lockout Cylinder Bleeding Procedure - (If Equipped)
- 2.19 Lockout Cylinder Check
- 2.20 Piston Drive Motor - 2WD & 4WD
- 2.21 Drive Torque Hub - 2WD/4WD Rear
- 2.22 Drive Torque Hub/Brake - 4WD Front
- 2.23 Drive Brake - 2WD/4WD Rear
- 2.24 Spark Arrestor Muffler
- 2.25 Dual Fuel/LPG System
- 2.26 Freewheeling Feature
- 2.27 Limit Switch Adjustment Procedure
- 2.28 Preventive Maintenance and Inspection Schedule
- Section 3. Troubleshooting
SECTION 3 - TROUBLESHOOTING
3120696 – JLG Sizzor – 3-3
No electrical signal being sent to lift down control
valve cartridge
Refer to electrical troubleshooting table
Lift down control valve cartridge not functioning
properly
Repair or replace lift down control valve cartridge
Lift cylinder not functioning properly Repair or replace lift cylinder
Platform raises and lowers erratically
Hydraulic system low Replenish hydraulic oil as required
Restricted or broken hydraulic line or fitting Clean, repair or replace line or fitting
Lack of lubricant on lift cylinder attach pins Lubricate as required (Refer to lubrication chart)
Counterbalance valve on lift cylinder improperly
adjusted or not functioning properly
Replace valve
Control valve not functioning properly Repair or replace valve
Sizzor arm pins not properly lubricated Lubricate as necessary
Wor n sea ls in lift cylinder Replace seals
Cylinder not functioning properly Repair or replace lift cylinder
Platform drifts down
Manual lowering valve not functioning properly Repair or replace valve
Wor n sea ls in lift cylinder Replace seals
Holding valve on lift cylinder not functioning prop-
erly
Repair or replace holding valve
High drive does not operate below set height
Damaged wiring on limit switch Repair or replace wiring
Damage limit switch Replace limit switch
Table 3-1. Platform Assembly - Troubleshooting
TROUBLE PROBABLE CAUSE REMEDY