Service Manual Instruction Manual
Table Of Contents
- Section A. Introduction - Maintenance Safety Precautions
- Section 1. Specifications
- Section 2. General
- Section 3. Chassis & Turntable
- 3.1 Tires And Wheels
- 3.2 Torque Hub
- Oil Information
- Roll and Leak Testing
- Tightening and Torquing Bolts
- Main Disassembly
- Output Carrier Disassembly
- Input Carrier Disassembly
- Hub-Spindle Disassembly
- Spindle-Brake Disassembly
- Cover Disassembly
- Cover Assembly
- Input Carrier Sub-Assembly
- Output Planet Gear Sub-Assembly
- Spindle - Brake Sub-Assembly
- Hub-Spindle Sub-Assembly
- Cover Sub-Assembly
- Main Assembly
- Integral Brake Check
- 3.3 Free Wheeling Option
- 3.4 Drive Motor
- 3.5 Oscillating Axle Bleeding Procedure and Lockout Test
- 3.6 Steer Adjustments
- 3.7 Swing Drive
- 3.8 Swing Bearing
- 3.9 Swing Brake - Mico
- 3.10 Rotary Coupling
- 3.11 Generator
- 3.12 Deutz D2.9 L4 Engine
- 3.13 Deutz D2011 Engine
- 3.14 Spark Arrester Cleaning Instructions
- 3.15 Glow Plugs
- 3.16 Deutz EMR 2
- 3.17 Bio Fuel in Deutz Engines
- 3.18 GM Engine General Maintenance
- 3.19 GM Engine Dual Fuel System
- Fuel Filter
- Direct Electronic Pressure Regulator (DEPR)
- Air Fuel Mixer
- Electronic Throttle Control (ETC)
- Electric Lock Off
- Engine Control Module (ECM)
- Heated Exhaust Gas Oxygen Sensor
- Gasoline Multi Point Fuel Injection System (MPFI)
- Gasoline Fuel Pump
- Gasoline Pressure And Temperature Sensor Manifold
- Fuel Filter
- Fuel Injector Rail
- Fuel Injector
- 3.20 GM Engine Fuel System Repair
- Propane Fuel System Pressure Relief
- Propane Fuel System Leak Test
- Propane Fuel Filter Replacement
- Direct Electronic Pressure Regulator (DEPR) Maintenance And Inspection
- Check/Drain Oil Build-Up In 2-Stage Vaporizer
- Air Fuel Mixer/Throttle Control Device Maintenance And Inspection
- Exhaust System And Catalytic Converter Inspection And Maintenance
- Temperature Manifold Absolute Pressure (TMAP) Sensor
- Throttle Body (ETC) Replacement
- Mixer Replacement
- Electronic Pressure Regulator (EPR) Replacement
- Regulator Replacement
- Coolant Hose Replacement
- Vapor Hose Replacement
- Engine Control Module Replacement
- Heated Exhaust Gas Oxygen Sensor Replacement
- 3.21 GM Engine LPG Fuel System Diagnosis
- Section 4. Boom & Platform
- Section 5. Hydraulics
- 5.1 O-Ring Lubrication
- 5.2 Cylinders - Theory of Operation
- 5.3 Cylinder Checking Procedure
- 5.4 Cylinder Removal and Installation
- Cylinder Locations
- Main Boom Telescope Cylinder Removal
- Main Boom Telescope Cylinder Installation
- Main Boom Lift Cylinder Removal
- Main Boom Lift Cylinder Installation
- Upright Level Cylinder Removal
- Upright Level Cylinder Installation
- Tower Boom Lift Cylinder Removal
- Tower Lift Cylinder Installation
- Tower Telescope Cylinder Removal
- Tower Telescope Cylinder Installation
- 5.5 Hydraulic Cylinder repair
- Tower Boom Lift Cylinder
- Cleaning and Inspection
- Assembly
- Upright Level Cylinder
- Cleaning and Inspection
- Assembly
- Master Cylinder
- Cleaning and Inspection
- Assembly
- Main Boom Lift Cylinder
- Cleaning and Inspection
- Assembly
- Main Boom Telescope Cylinder
- Cleaning and Inspection
- Assembly
- Tower Boom Telescope Cylinder
- Cleaning and Inspection
- Assembly
- Platform Level (Slave) Cylinder
- Cleaning and Inspection
- Assembly
- Jib Lift Cylinder (AJ Only)
- Cleaning and Inspection
- Assembly
- Steer Cylinder
- Cleaning and Inspection
- Assembly
- Axle Lockout Cylinder
- 5.6 Hydraulic Pump (Gear)
- 5.7 Variable Pump
- 5.8 Hydraulic Component Start-Up
- 5.9 Pressure Setting Procedures
- Section 6. JLG Control System
- Section 7. Basic Electrical Information & Schematics
SECTION 5 - HYDRAULICS
3121616 – JLG Lift – 5-63
Placing Pump Back Into Service
1. If shop test stand is available, use the following proce-
dure for testing rebuilt pumps:
a. Mount pump on test stand. Make sure proper level
of clean oil is available in reservoir. Check suction
line for leaks and obstructions.
b. Start pump and run for three minutes at zero pres-
sure.
c. Intermittently load pump to 500 P.S.I. for three min-
utes.
d. Intermittently load pump to 1000 P.S.I. for three
minutes.
e. Intermittently load pump to 2000 P.S.I. for three
minutes.
f. Remove pump from test stand and check for free-
ness of drive shaft. Check pump for signs of external
leakage.
2. If shop test stand is not available, use the following proce-
dure for testing rebuilt pumps:
a. For engine driven pumps, mount pump on equip-
ment and run pump at 1/2 engine speed at zero
pressure for three minutes.
b. Operate control valve and build pressure intermit-
tently for three minutes.
c. Increase engine speed to full throttle and build
pressure intermittently for three minutes.
d. Stop engine and check pump for external leaks.
5.7 VARIABLE PUMP
Ports and Pressure Gauges
Proper servicing of pumps and motors requires pressure mea-
sured and monitored at various hydraulic circuit points. The
Series 42 pump has several locations at which to take these
measurements. The following outlines show gauge port loca-
tions, and gauge and fitting size for each port.
NFPE Control
The 3-position FNR control, and electric and hydraulic non-
feedback proportional (NFPE and NFPH) controls are non-
feedback type controls. FNR and NFPE controls consist of
pump housing mounted modules. Hydraulic input for NFPH is
received through ports on top of pump [9/16–18 SAE O-ring
fitting].
Non-feedback controls are factory set. Control modules can be
removed to clean ports and change O-rings.
FNR and NFPE orifice plugs are located inside the servo piston
covers. NFPH orifice plugs are located in the NFPH ports. Ori-
fice plugs may be cleaned or replaced.
Table 5-2. Recommended Gauge Size
Gauge
Port
Name
Pressure
Measured
Recommended Gauge
Size
Fitting
PSI Bar
M1 & M2
System
Pressure
Ports A & B
10000 600 9/16-18 ORF
M3
Charge
1000 60 3/4-16 ORF
M4 & M5
Servo
1000 60 9/16-18 ORF
L1 & L2
Case
500 35 1-1/16-12 ORF
S
Charge Pump
Inlet Vacuum
30 in. Hg Vac. 1 1-1/16-12 ORF