Frame rails to platform console, this JLG 40ic, 45ic parts catalog PDF (OEM 3120853) breaks both lifts down assembly by assembly across 157 pages: steering and drive installations, turntable and swing components, boom, platforms, cylinders, hydraulics, electrical, and decals. Exploded views pair every callout with a factory part number, and the part number index at the back lets you work backward from a number scribbled on a core tag. Hydraulic diagrams (including manual ascent), the standard electrical diagram with harness installations, and a recommended service parts stock list round out the book. When the ground control station kills power, order the correct breaker the first time: 30 Amp on one circuit, 15 Amp on the other, both listed by part number. A wrong seal kit parks a lift for a week. Search the text layer or jump the bookmarks, confirm your number, and put the machine back in the air.
What's Inside This JLG 40ic, 45ic Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Frame | 7-48 | Steering Installations, Tire and Wheel Drive Installations, Drive Hub Assembly, Drive Motor Assembly, Drive Brake Assembly, Valves, Battery and Tilt Indicator Installations |
| Turntable | 49-68 | Mounted Components Installation, Control Valve Assembly, Swing Drive and Turntable Bearing Installations, Swing Motor Assembly, Swing Bearing Assembly |
| Boom | 69-76 | Limit Switches Installations, Main Boom Components Assembly |
| Platforms | 77-90 | Platform Components Installation, Rotator Motor/Pump/Tank Assembly, Platform Console Assembly, Controller Assembly - Drive/Steer |
| Cylinder | 91-114 | Upper Lift Cylinder Assemblies, Mid Lift Cylinder Assemblies, Lower Lift Cylinder Assemblies, Master Cylinder Assembly, Platform Rotator Cylinder Assembly, Slave Cylinder Assembly |
| Hydraulic | 115-124 | Diagram - Manual Ascent, Diagram List |
| Electrical | 125-138 | Diagrams and Diagram List, Diagram - Standard, Harness Installations |
| Decals | 139-142 | Installation |
| Recommended Service Parts Stock | 143-148 | Models Lifts Standard Parts, Models Lifts Variable Parts |
| Special Options | 149-150 | List |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hose, Vapor length | 30.5cm | p. 35 |
| Hose, Water length | 41cm | p. 35 |
| Breaker, Circuit - 30 Amp | 30 Amp | p. 63 |
| Breaker, Circuit - 15 Amp | 15 Amp | p. 63 |
| Diode 6 Amp | 6 Amp | p. 126 |
| Relay - 75 Amp Spst (Glow Plug Relay) | 75 Amp | p. 136 |
| Resistor - 6.8 Ohms 1/4 Watt | 6.8 Ohms | p. 134 |
| Resistor 20 Ohm 12 Watt | 20 Ohm | p. 135 |
| Orifice - 1.5mm | 1.5mm | p. 27 |
| Orifice - 2mm | 2mm | p. 27 |
| Alternator - 40 Amp | 40 Amp | p. 39 |
| Breaker, Circuit - 5 Amp | 5 Amp | p. 63 |
JLG 40ic, 45ic Common Problems This Manual Covers
JLG 45ic won't power up, need correct 12V starter battery part number for replacement
Order the 12V starter battery, JLG part 0400003, before chasing wiring gremlins. Verify fitment against the Recommended Service Parts Stock list on page 144 for your serial range. If the battery keeps dying, price the 40 Amp alternator listed on page 39 while you have the catalog open.
Manual Section: Recommended Service Parts Stock p. 144Engine cranks but no fuel at key-on, need fuel shutoff solenoid part number
Check the Vanguard gas engine fuel system parts list before ordering; match your vapor hose to the 30.5cm length listed on page 35. Trace the fuel shutoff circuit on the wiring diagram on page 128 to identify the relay and connector part numbers feeding the solenoid.
Manual Section: Vanguard Gas Engine Installations p. 35Blown circuit breaker in platform console, can't tell which amp rating to order
Pull the breaker and read the stamp before ordering; the turntable breakers are listed as 30 Amp, 15 Amp, and 5 Amp on page 63, and the platform console runs a 20 Amp breaker on page 86. Match the amp rating exactly and cross-check the exploded view in the Platforms section starting on page 77.
Manual Section: Platforms p. 86Diesel won't fire in cold weather, need the glow plug relay part number
Find the 75 Amp SPST glow plug relay in the harness installations parts list on page 136. Verify the connector count against the wiring diagram on page 128 and order the matching harness connectors at the same time; corroded terminals kill more cold starts than the relay itself.
Manual Section: Harness Installations p. 136Blown hydraulic hose under the turntable, can't identify which fitting and hose to order
Trace the burst line on the hydraulic schematic on page 116, then match hose length and fitting from the hose list in the Hydraulic section. If the line runs through an orifice, match the 1.5mm or 2mm size listed on page 27 against the stamp on the old fitting.
Manual Section: Hydraulic Diagram p. 116Frequently Asked Questions
What are the replacement specifications for the 12V starter battery on a JLG 40ic, 45ic lift?
The JLG 40ic/45ic uses a 12V battery with part number 0400003. The battery is secured using a battery hold-down (P/N 0400002) and battery seat (P/N 3980003). p. 23
What is the part number for the Vanguard engine oil filter?
The oil filter for the Vanguard engine is part number 7017600. It is recommended to stock 12 units for fleets of 1 to 20 machines. p. 148
What is the part number for the hydraulic oil filter element?
The hydraulic oil filter element is part number 2120158. It is recommended to stock 4 units for a fleet of 1 to 10 machines. p. 144
What is the part number for the Vanguard engine air cleaner element?
The air cleaner element for the Vanguard engine is part number 7015004. It is recommended to stock 12 units for fleets of 1 to 20 machines. p. 144
What is the part number for the ignition key?
The replacement ignition key is part number 7012560. It is recommended to stock 1 unit for every 1 to 10 machines in the fleet. p. 144
What format is this JLG 40ic manual in?
All 157 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Am I able to print pages from this JLG 40ic manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
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