JLG 1055 1255 Illustrated Parts Manual 31211373 Rev E – PDF
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Complete JLG illustrated parts manual for 1055 and 1255 telehandlers. P/N 31211373 Rev E, covering ULS and LS configurations with exploded views for every major system.
Description
JLG 1055 1255 Illustrated Parts Manual – P/N 31211373 Rev E
This JLG 1055 1255 Illustrated Parts Manual is the complete parts reference for the 1055 and 1255 telehandler models. Published under part number 31211373, Revision E, dated October 15, 2021, this PDF covers both Ultra Low Sulfur (ULS) and Low Sulfur (LS) machine configurations. Every major assembly is broken down into exploded-view illustrations with itemized part numbers, descriptions, and quantities, making it straightforward to identify exactly which component you need before placing an order.
File Details
- Manual Type: Illustrated Parts Manual
- Brand: JLG
- Models Covered: 1055, 1255
- Document Number: 31211373
- Revision: Rev E
- Publication Date: October 15, 2021
- Language: English
- File Format: PDF
- Page Count: 1278
- Configurations: Ultra Low Sulfur (ULS) and Low Sulfur (LS)
Chapters Covered
- Section 1 – Frame and Attaching Parts: Frame Cover Installation (ULS/LS), Engine Mounting, Engine Enclosure and Cover, Hood Assembly, Tank Installation, Fuel Tank, Hydraulic Tank, Outriggers, Counterweight (1055/1255), Mirror Installation
- Section 2 – Boom: Boom Assembly (1055/1255), First through Fourth Boom Assemblies, Extend Cylinder Pins, Second Boom Section Extend Chain, Third Boom Section Retract Chain, Chain Sheave Assemblies, Boom Pinning, Boom Pivot, Lift Cylinder, Compensation Cylinder, Boom Brushes, Boom Angle Indicator, Manual Quick Coupler, Hydraulic Quick Coupler, Boom Pin, Tilt Cylinder Pin, Quick Coupler Assembly, Boom Prop (ANSI/Canada), Boom Prop Bracket
- Section 3 – Attachments: Carriage Assemblies (50 in, 1524 mm, 72 in, PVC 1911/2005), Side Tilt Carriage Assemblies (50 in, 60 in, 72 in), 48 in/12000 lb Capacity Side Shift Carriage, 90 Swing Carriage, Fork Positioning Carriage with Forks (4.5 Ton), Dual Fork Carriage Assembly, Dual Fork Carriage Valve Assembly, Dual Fork Positioning Carriage (50 in) – 1255, Boom – 3 ft with Winch, Truss Boom (0.9 Ton – 3.7 m with Winch), Truss Boom (15 ft), Adjustable Truss Boom, Mast (8 ft), Side Tilt Electric Mast (8 ft), Kit Decal, Main Lift Cylinder, Fork Mounted Bucket (1.0 m³), Buckets (1.0 yd³, 1.15 m³, 102 in), Fork Mounted Basket, Fork Mounted Platform, Pipe Handler Carriage, Fork Mounted Hook (4 Ton), Coupler Mounted Hook, Fork Clamps Install, Blocking Fork, Lumber Forks, Pallet Forks, Fork Extensions, Fork Mounted Trash Hopper, Adjustable Truss Boom Installation (Fork Mounted), Sweeper Assemblies, Swing Carriage 180, Drywall Swing Carriage Installation, Rotating Drywall Carriage
- Section 4 – Engine and Attaching Parts: Engine Installation (ULS/LS), 3.8L Engine (ULS/LS), Fuel Lines Installation (ULS/LS), Primary Fuel Filter Installation (ULS/LS), Fuel Tank Assembly, Cooling Package Installation (ULS/LS), Radiator Cooling Package, HOC Lines, Coolant Lines (ULS/LS), CAC Lines (ULS/LS), TOC Lines, Surge Tank, Fan, Fan Guard, Air Intake Lines (ULS), Air Cleaner Lines (LS), Air Cleaner Installation (ULS/LS), Air Cleaner Assembly (90/100KW), Air Intake Duct, Exhaust Installation (ULS/LS), Muffler Installation (LS), DEF Lines, DEF Pump Lines, DEF Tank, DEF Pump and Control, Urea Pump, DEF Tank Assembly, DEF Breather Valve, Engine Parts Installation (No Heater/Heater), A/C Pump Installation (ULS/LS), A/C Lines Installation, Fuel Cap Assembly, Heater Breather, Air Intake Shut Off Valve Installation
- Section 5 – Drive Train: Drive Train Installation, Front Axle Installation and Mounting, Front Axle components (Central Housing, Differential, Hub Reduction, Brakes, Steering, Trunion), Front Axle Differential Kit, Steering Adjusting Bolt Kit, Ring Gear Support Kit, Planet Gear Carrier Kit, Reduction Bushing, Support Assemblies, Steering Case Assemblies, Rear Axle Installation and Mounting, Rear Axle components (Central Housing, Differential, Hub Reduction, Brakes, Steering, Trunion), Rear Axle Differential Kit, Planet Gear Carrier Kit and Ring Gear Kit, Steering Case Assemblies, Steering Adjust Bolt Kit, Ring Gear Support Kit, Support Assemblies, Reduction Bushing Assembly, Drive Shafts Installation, Rear Drive Shaft, Front Mid Shaft, Front Drive Shaft, Transmission Installation, Powershift Transmission, Transmission components (Engine Connection, Converter, Input, Housing Groups, Clutch Groups, Coupling Groups, Output, Power Take-Off, Control Unit, Shift System, Pressure Regulator, Pressure Oil Pump, Inductive Transmitter, Filter, Oil Dipstick, Accessories), Transfer Box Housing, LSI Axle Sensor Installation, Tire/Wheel Sets and Assemblies (400/75-28 Air, 14-24 16PR Air, 17.50-25 16 PLY, 400/75-28 Foam, 17.50-25 G2 Foam Filled, 14-24 12PR Foam, 360/85-28 Solid, 400/75-28 Pneu Non Marking, 400/75-28 FF Non Marking, 18 x 625), Fender Installation, Wheel Chock Installation, Toolbox Installation
- Section 6 – Cab: Cab Mounting, Cab Mounts Installation, Front Cab Outrigger, Cab Fender Installation, Cab Guard Installation (Top/Front/Top and Front), OROPS Cab Installation, EROPS Cab Installation, LSI Enclosed Cab Installation, LSI Open Cab Installation, Cab Trim Kits, Cab EPD Caulk, Open Cab Assembly, Open Cab Plug Group, Open Cab LSI Display Installation (PVC 2005), Enclosed Cab Assembly, Rear Window Installation, Door Installation, Enclosed Cab Plug Group, LSI Display Installation, Basic Mirror Installation, Front Cover Installation, Level Indicator Installation, Front Wiper Installation, Washer Tank Installation, Rear Window Installation (WO/Wiper) (ANSI/ISO/ENG-SPAN), Headliner Installation, Open Cab Trim Installation, Enclosed Cab Trim Installation, Open Cab Front Cover, Enclosed Cab Front Cover, Seat Installation, Seat, Armrest, Seat Belt Installation, Heater Installation, Heater and A/C Installation, Heater Assembly, Heater, Heater and A/C Assembly, Heater and A/C, HVAC Cab Actuator, Cab Condenser Assembly, A/C Receiver Drier, Condenser, Rear Wiper Installation, Roof Wiper Installation, Roof Cap Installation (A/C/No A/C), Non Skid Tape Installation, External Window Release Installation, Switch Light Installation, Telematics Ready Installation, Roof Pigtail Cap Installation, Roof Pigtail Installation, No Sunscreen Installation, Retractable Sunscreen Installation, Rear Window Exit Decal Installation, Filter Tray Panel, Front Duct Cover, Washer Bottle, HVAC Actuators Harness, Rear Window Assembly, Door Upper Glass Assembly, Cab Latch Assembly, Cab Door Trigger Assembly, Door Assembly, Door Strap Installation, Cab Door, Fire Extinguisher Installation, Wiper-Turn Switch Installation
- Section 7 – Controls: Accelerator Pedal Installation and Assembly, Brake Pedal Installation and Assembly, Brake Pedal Plate, Steering Column Installation (No FNR Lever), Steering Column Installation, Steering Wheel Installation and Assembly, Horn Button Installation, Joystick Installation (2 Roller, 0 Button), Outrigger Switches Installation, Column Clamp Installation, Joystick
- Section 8 – Hydraulic Circuits: Main Hydraulics Installation, Steer Select Valve Installation and Assembly, Priority Function Manifold Installation, Priority Function Manifold Valve Assembly, Main Control Valve Installation and Assembly, Frame Level and Outrigger Valve Installation and Assembly, Frame Hydraulic Installation, Cab Hydraulic Installation, Boom Hydraulic Installation, Engine Bay Hydraulic Installation, Piston Pump Installation and Assembly (PVC 1911/2005), Boom Hydraulic Tubes Installation, Boom Auxiliary Hydraulic Installation, Boom Auxiliary Hydraulic with Hydraulic Coupler, Frame Level Installation, Rear Axle Stabilizer Installation and Cylinder Installation, Lift Cylinder Valve Installation (No Ride Control), Ride Control Installation (1055/1255), Ride Control Hydraulic Lines, Counterbalance Valve Hydraulic Lines (Lift – Ride Control), Frame Level Cylinder Installation, Extend/Retract Cylinder Installation, Lift Cylinder Installation (1055/1255), Quick Coupler Valve Assembly, Front Axle Lines Installation, Rear Axle Lines Installation, Valve Assembly, Check Valve Assembly, Valve Installation – SAHR Brake, Valve Assembly – SAHR Brake, SAHR Brake Valve, Twin/Tri Line Hoses Installation
- Section 9 – Hydraulic Components: Cylinder Group Installation (1055/1255), Lift Cylinder (1055/1255), Tilt Cylinder Installation and Assembly (1055/1255), Compensation Cylinder (1055/1255), Frame Level Cylinder, Outrigger Cylinder, Rear Axle Stability Cylinder, Extend/Retract Cylinder, Quick Coupler Cylinder, Main Control Valve, Tank Hydraulic, Hydraulic Filter, Divertor Valve, Steering Select Valve, Priority Manifold Valve (PVC 1911/2005), Frame Level and Outrigger Valve, Piston Pump, Rear Axle Stabilizer Valve, Steering Orbital Valve, Side Tilt Cylinder, Side Shift Carriage Cylinder, Swing Carriage Cylinder, Cylinder Assembly (Side Shift Carriage), Flow Divider Valve, Dual Fork Cylinder Assembly, Pipe Handler Cylinder, Grapple Bucket Cylinder, Air Shut Off Valve, Fork Positioning Cylinder
- Section 10 – Electrical: Main Electrical Installation (ULS/LS), Electrical Frame Installation (PVC 1911/2005), Engine Bay Wiring Installation (ULS/LS), Engine Bay Electrical Installation (ULS/LS), Frame Wiring Installation (ULS/LS) (PVC 1911/2005), Power Distribution Electrical Box, Boom Angle Sensor Installation (PVC 1911/2005), Cab Electrical Installation (PVC 1911/2005), Cab Dash Electrical (ULS/LS) (PVC 1911/2005), Open Cab Electrical Installation with Options, Enclosed Cab Electrical Installation with Options, Reverse Camera Installation, Reverse Camera (No HBD), Rear Camera Option Harness, Reverse Sensor Installation, TP Boom Auxiliary Electric Installation, Boom Auxiliary Electric Harness Installation, Engine Wiring Installation (ULS/LS), Boom Auxiliary Harness, Engine ECU Installation (ULS/LS), Battery Installation, Arctic Cold Weather Package Installation (ULS/LS), Artic Batteries Installation, Hydraulic Tank Heater Installation, Multifunction Display Installation, Backup Alarm Installation (97 DB), White Noise Backup Alarm Installation, Road Lights Installation, Driving Light (RHD – LH/RH), Rear Light (LH/RH), Cab Worklights Installation (No A/C – LED / A/C – LED), Boom Work Lights Installation (LED), Boom Lights Installation, Boom LED Lights Installation, Beacon Installation (LED), Boom Worklights Harness, A/C Option Harness, Rear Frame Harness, Front Frame Harness (PVC 1911/2005), Engine Chassis Harness, Engine Harness, Front Frame Headlight Harness, Tail Lights Harness, Reverse Sensor Harness, Cab Harness (PVC 1911/2005), Option 1 Cab Harness, Option 2 Cab Harness, Cab Option Harness, Telematics Ready Harness, Fuel Filter Heater Installation, Roof Pigtail Harness, Boom Auxiliary Electric Harness Installation, Platform Harness, USB Charger Installation, Telematics Harness, Customer Supplied Telematics Canbus, Gateway Controller, Telematics Canbus Installation (ClearSky 2), 4WARD Telematic Harness (ClearSky 2), ClearSky Installation 3-Wire (ANSI/CE), Air Shutoff Valve Harness, Air Shut Off Valve Harness (Engine), Ride Control Installation, TBAP Harness, DEF Purge Light Harness, Standard Electrical Board Assembly, Communication Analyzer Cable, Option 2 Electrical Board Assembly, Option 1 Electrical Board Assembly, Boom Ride Float Harness, Telematics Adapter Harness, LSI Harness – Boom Retract
- Section 11 – Decals: Capacity Chart Holder Installation, Decal Installation (1055/1255), Decal Installation (ANSI/ISO/English-French/English-Spanish), Capacity Charts (ANSI/Metric) (1055/1255), Decal Installation, Reverse Sensor System Decals, ClearSky Decal Installation
- Section 12 – Recommended Service Parts Stock: Recommended Service Parts Stock list
- Section 13 – Special Options: Special Options list including TL12 Boom Kit, Access Control Kit, Beacon Kit, Boom Brushes Kit, Boom Kits, Boom Wear Pads Kit, Cab Display Kit, Cab Electrical Options, Cab Enclosure Kits, Cab Guard Kits, Cab Heater and A/C Kits, ClearSky Telematics Kits, Cold Weather Kits, DEF Sensor Upgrade Kits, External Rear Window Release Kit, Fender Kit, Filter Kits, Fire Extinguisher Kit, Hood Hinge Support, Latch Kits, Lights Kits, Rear Wiper Kit, Reverse Camera Kits, Reverse Sensing System Kit, Roof Wiper Kit, Short Roof Cap Kit, Tools Kits, Upgrade Kits, Strainer Kit, Smart Shift Kit
- Part Number Index: Complete numerical index of all part numbers with corresponding page references
Complete Bookmarks
The complete bookmarks in the “JLG 1055 1255 Illustrated Parts Manual 31211373 Rev E – PDF” are as follows:
+31211373_E_1055 1255_JLG_Partsp. 1
+SECTION 1 – FRAME AND ATTACHING PARTSp. 17
+SECTION 2 – BOOMp. 45
+SECTION 3 – ATTACHMENTSp. 123
+SECTION 4 – ENGINE AND ATTACHING PARTSp. 309
+SECTION 5 – DRIVE TRAINp. 405
+SECTION 6 – CABp. 621
+SECTION 7 – CONTROLSp. 783
+SECTION 8 – HYDRAULIC CIRCUITSp. 813
+SECTION 9 – HYDRAULIC COMPONENTSp. 905
+SECTION 10 – ELECTRICALp. 979
+SECTION 11 – DECALSp. 1211
+SECTION 12 – RECOMMENDED SERVICE PARTS STOCKp. 1253
+SECTION 13 – SPECIAL OPTIONSp. 1257
This JLG 1055 1255 Illustrated Parts Manual is organized to get you to the right part number as fast as possible. The manual opens with a machine configuration guide that explains how to determine whether your machine is equipped with the Ultra Low Sulfur decal, directing you to the correct ULS or LS breakdowns throughout the book. From there, each section follows a logical progression: exploded-view illustrations are paired with itemized tables listing item numbers, part numbers, quantities, descriptions, and revision codes. The illustrations use reference numbers that correspond directly to the tables, so you can visually locate a component on the drawing and then find its exact part number in the adjacent list.
IMAGES PREVIEW
The scope of this parts manual is extensive. It covers the complete boom assembly with all four boom sections broken down separately for both the 1055 and 1255 models, including the extend and retract chain installations, chain sheave assemblies, wear pads, and all associated pins and hardware. The undercarriage and drive train sections detail the front and rear axles down to the differential, hub reduction, brakes, steering, and trunnion components, along with the complete Powershift transmission broken into its major sub-assemblies. Engine and attaching parts are covered for both the QSF 3.8L (130HP) ULS engine and the 3.8L (110HP) LS engine, including fuel systems, cooling packages, air intake and exhaust, DEF system components, and accessory drives. The hydraulic circuits section maps out the main hydraulics installation along with every valve, pump, cylinder, and hose routing for the frame, cab, boom, and engine bay. The electrical section is equally thorough, covering main electrical installation, frame and engine bay wiring, cab electrical, sensors, lights, alarms, telematics, and the power distribution box with fuse assignments. The attachments section alone spans well over a hundred pages of exploded views for carriages, forks, buckets, booms, masts, sweepers, and specialty handling equipment.
For anyone maintaining, repairing, or refurbishing a JLG 1055 or 1255 telehandler, having the correct part number is the difference between a job done right and a job delayed by wrong orders. This JLG 1055 1255 parts manual eliminates the guesswork. Whether you are replacing a worn boom wear pad, tracking down a hydraulic valve cartridge, identifying the right seal kit for a lift cylinder, or confirming which fuse protects a particular circuit, the answer is in these pages. The exploded views make it possible to see how components assemble and relate to one another, which is especially useful when a machine has been modified or when a previous repair used incorrect hardware.
The recommended spare parts stock list near the end of the manual gives you a field-tested starting point for stocking the most frequently needed maintenance items, from coils and fuses to filters, switches, and relays. The special options section covers kits and accessories that may have been ordered with a particular machine, with references to the detailed breakdowns elsewhere in the book. The alphabetical part number index at the back lets you start with a part number you already have and jump straight to the page where it appears.
This JLG 1055 1255 Illustrated Parts Manual is delivered as an instant PDF download. There is no shipping wait and no physical book to keep track of. The file opens on any device that reads PDFs, whether that is a shop computer, a laptop in the field, a tablet, or a phone. Pages can be printed for use at the machine or kept digital for quick searching within your PDF reader. Because the manual covers both the 1055 and 1255 models and both ULS and LS configurations, one file serves an entire mixed fleet, making it a practical addition to any maintenance library. If you work on these machines, this parts manual belongs within reach.
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