JLG 740AJ Boom Lift Parts Manual

Name: JLG 740AJ Boom Lift Parts Manual
Brand: MidWestTech
SKU: 3121161
Price: 69.73 USD
Availability: InStock

334 pages · Publication 3121161

$69.73

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Models: 740AJ
Serial coverage: Prior to 0300185828, Exclude Serial Number Range: 0300062899, 0300064684
Manual type: Parts Manual
Pages: 334
Publication: 3121161
Condition: Brand new

JLG 740AJ Boom Lift Parts Manual, publication 3121161

What's inside

From the manual's own table of contents: 33 sections, 75 entries. See sample pages (PDF, 521 KB)

Search the contents

General42 topics

SECTION 1 - FRAME
FIGURE 1-1. AXLE AND STEERING INSTALLATION
FIGURE 1-2. TIRE AND WHEEL INSTALLATIONS
FIGURE 1-3. DRIVE HUB ASSEMBLY (Prior to SN 0300138447)
FIGURE 1-5. DRIVE MOTOR ASSEMBLY (Prior to SN 0300138447)
FIGURE 1-7. DRIVE VALVES AND SHIELDS INSTALLATIONS
FIGURE 1-8. TOW PACKAGE INSTALLATION
SECTION 2 - TURNTABLE
FIGURE 2-1. CONTROL VALVES AND HORN INSTALLATIONS
FIGURE 2-2. MAIN CONTROL VALVE ASSEMBLY
FIGURE 2-3. ACCESSORY VALVE ASSEMBLY
FIGURE 2-5. TURNTABLE BEARING AND SWING DRIVE INSTALLATION
FIGURE 2-6. SWING MOTOR/HUB ASSEMBLY (Prior to SN 0300134353)
FIGURE 2-8. DEUTZ ENGINE INSTALLATION (Prior to SN 0300077500)
FIGURE 2-10. FORD ENGINE INSTALLATION (Prior to SN 0300077500)
FIGURE 2-12. DUAL FUEL INSTALLATION (GAS MACHINES OPTIONS)
FIGURE 2-13. GM ENGINE INSTALLATION (Prior to SN 0300140592)
FIGURE 2-15. PISTON PUMP ASSEMBLY (SAUER DANFOSS)
FIGURE 2-16. PISTON PUMP ASSEMBLY (EATON)
FIGURE 2-17. TANK INSTALLATIONS
FIGURE 2-18. ROTARY COUPLING INSTALLATION (Prior to SN 0300138447)
FIGURE 2-20. GROUND CONTROL BOX ASSEMBLY (Prior to SN 0300139070)
FIGURE 2-22. ELECTRICAL OPTIONS INSTALLATION (TURNTABLE MOUNTED)
FIGURE 2-23. HOODS INSTALLATION (Prior to SN 0300089982)
FIGURE 2-25. HOODS INSTALLATION (STEEL)
FIGURE 2-26. ENGINE TRAY JACK INSTALLATION (OPTIONAL)
FIGURE 2-27. 2500W GENERATOR INSTALLATION - DEUTZ MACHINES (ANSI AND CSA SPEC ONLY) (OPTIONAL)
FIGURE 2-30. 2500W GENERATOR INSTALLATION - GM MACHINES (OPTIONAL)
SECTION 3 - BOOM
FIGURE 3-1. BOOM AND CYLINDERS INSTALLATION
FIGURE 3-2. MAIN BOOM ASSEMBLIES
FIGURE 3-3. ROTATOR ASSEMBLY (Prior to SN 0300130881)
FIGURE 3-5. VALVE AND LIMIT SWITCH INSTALLATIONS (BOOM MOUNTED)
SECTION 4 - PLATFORM
FIGURE 4-1. PLATFORM COMPONENTS INSTALLATION (Prior to SN 0300130881)
FIGURE 4-2. PLATFORM COMPONENTS INSTALLATION (SN 0300130881 through 0300185827)
FIGURE 4-3. PLATFORM CONSOLE ASSEMBLY (Prior to SN 0300138447)
FIGURE 4-5. CONTROLLER ASSEMBLY (SWING AND LIFT)
FIGURE 4-6. CONTROLLER ASSEMBLY (DRIVE AND STEER)
FIGURE 4-7. SOFT TOUCH SYSTEM INSTALLATION (OPTIONAL) (Prior to SN 0300137666)
FIGURE 4-8. SOFT TOUCH SYSTEM INSTALLATION (OPTIONAL) (SN 0300137666 through 0300185827)
SECTION 5 - CYLINDER

FIGURE 5-1. UPRIGHT LEVEL CYLINDER ASSEMBLY

FIGURE 5-2. UPRIGHT LEVEL CYLINDER ASSEMBLY (SERVICE REPLACEMENT)

FIGURE 5-3. LIFT CYLINDER ASSEMBLY - JIB (ORIGINAL EQUIPMENT)

FIGURE 5-4. LIFT CYLINDER ASSEMBLY - JIB (SERVICE REPLACEMENT)

FIGURE 5-5. LIFT CYLINDER ASSEMBLY - MAIN BOOM (ORIGINAL EQUIPEMNT)

FIGURE 5-6. LIFT CYLINDER ASSEMBLY - MAIN BOOM (SERVICE REPLACEMENT)

FIGURE 5-7. LIFT CYLINDER ASSEMBLY - TOWER BOOM (ORIGINAL EQUIPMENT)

FIGURE 5-8. LIFT CYLINDER ASSEMBLY - TOWER BOOM (SERVICE REPLACEMENT)

FIGURE 5-9. MASTER CYLINDER ASSEMBLY (ORIGINAL EQUIPMENT)

FIGURE 5-10. MASTER CYLINDER ASSEMBLY (SERVICE REPLACEMENT)

FIGURE 5-11. SLAVE CYLINDER ASSEMBLY (ORIGINAL EQUIPMENT)

FIGURE 5-12. SLAVE CYLINDER ASSEMBLY (SERVICE REPLACEMENT)

FIGURE 5-13. STEER CYLINDER ASSEMBLY (Prior to SN 0300142664)

FIGURE 5-15. TELESCOPE CYLINDER ASSEMBLY - MAIN

FIGURE 5-16. TELESCOPE CYLINDER ASSEMBLY - MAIN (SERVICE REPLACEMENT)

SECTION 6 - HYDRAULIC

FIGURE 6-1. DRIVE HYDRAULIC DIAGRAM (Prior to SN 0300137975)

FIGURE 6-3. STANDARD HYDRAULIC DIAGRAM (WITH FENNER AND HALDEX BRAND AUXILIARY PUMP)

FIGURE 6-4. STANDARD HYDRAULIC DIAGRAM (WITH BUCHER BRAND AUXILIARY PUMP)

FIGURE 6-5. HYDRAULIC DIAGRAM LIST

SECTION 7 - ELECTRICAL

FIGURE 7-1. ELECTRICAL DIAGRAM LIST

FIGURE 7-2. HARNESS COMPONENTS INSTALLATION WITHOUT UGM

Show all 34 sections

FIGURE 7-3. HARNESS COMPONENTS INSTALLATION WITH UGM

SECTION 8 - DECALS

FIGURE 8-1. DECAL INSTALLATION (ANSI AND CSA SPEC) (Prior to SN 0300089982)

FIGURE 8-3. DECAL INSTALLATION (COUNTRY SPEC) (Prior to SN 0300089982)

SECTION 9 - RECOMMENDED SERVICE PARTS STOCK

FIGURE 9-1. MODEL 740AJ STANDARD PARTS

FIGURE 9-2. MODEL 740AJ VARIABLE PARTS

SECTION 10 - SPECIAL OPTIONS

FIGURE 10-1. SPECIAL OPTIONS

PART NUMBER INDEX

Inside this manual

Real pages from this parts manual (334 pages). Open the sample pages (PDF, 520 KB)

Sample pages from the JLG 740AJ Boom Lift Parts Manual: Parts illustration, Parts illustration, Parts illustration

Parts illustration, page 146: FIGURE 2-25. HOODS INSTALLATION (STEEL)
Parts illustration, page 266: SECTION 6 - HYDRAULIC
Parts illustration, page 301: SECTION 8 - DECALS

Other manuals for this machine

Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the 740AJ are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.

This manual: Parts Manual 3121161$69.73

Service manuals

Service Manual 3121160 · 582 pagesCovers 740AJ$69.81Details

Service Manual 3121651 · 554 pagesCovers 740AJSerial: 0300185828 to Present$69.85Details

This is a parts manual

Here's how it compares to the other manual types.

Service manual

Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.

Operator's manual

Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.

This manual

Parts manual

Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.

What it's used for

Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.

Service shops and owner/operators who repair their own equipment

Identifying correct parts and seeing how assemblies come apart and go back together

Keeping equipment running with less downtime

Factory manual, 334 pages

Quantity one is the manual described above.

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Other editions and similar models

Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).