Jegs 79012 User Manual

Installation Instructions for 79012
Low Profile Transmission Jack
1000 lb. Max Capacity
Maximum Height 23”
Minimum Height 8.5”
Warning
Read all safety warnings and instructions.
Save all warnings and instructions for future reference.
Failure to heed these markings may result in personal injury and/or property damage:
1. Study, understand, and follow all instructions before operating this device.
2. Do not exceed 1000 lb. rated capacity.
3. Use only on hard, level surfaces.
4. Adequately support the vehicle before starting repairs.
5. Use of this product is limited to the removal, installation, and transportation in the lowered position, of transmissions,
transfer cases, and transaxles.
6. Do not adjust safety valve.
7. Wear ANSI-approved safety goggles and heavy-duty work gloves during use.
8. Keep clear of load while lifting and lowering.
9. Lower load slowly.
10. Do not use for aircraft purposes.
11. Inspect before every use; do not use if parts loose or damaged.
12. Do not alter the jack or use attachments and/or adapters that are not supplied by the manufacturer.
13. The warnings, precautions, and instructions discussed in this manual cannot cover all possible conditions and
situations that may occur. The operator must understand that common sense and caution are factors, which cannot be
built into this product, but must be supplied by the operator.
14. The brass components of this product contain lead, a chemical known to the State of California to cause cancer,
birth defects (or other reproductive harm). (California Health & Safety Code § 25249.5, et seq.)
Save these instructions!
Setup
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text
under subheadings therein before set up or use of this product.
WARNING! TO PREVENT SERIOUS INJURY: Remove load from the jack before any procedure on this page.
Note: For additional information regarding the parts listed in the following pages, refer to Parts List and Diagram.
Assembly
1. Connect a Support (41) to each corner of the
Saddle (32) using a Bolt (39) and Washer (40).
2. Thread a Wing Nut (37) onto the threaded end of
the Chain Hook (38) with its wings facing the hook.
3. Slide a Washer (31) onto the threaded end of the
Chain Hook.
4. Insert the threaded end of the Chain Hook
through the hole on the bracket on the Saddle, as
shown.
5. Secure the Chain Hook to the Saddle’s bracket
using Washer (31) and Wing Nut (37).
1-800-345-4545 jegs.com

Jegs 79012 Specifications

General

Model	79012
Type	Hydraulic Bottle Jack
Capacity	12 Ton
Material	Steel
Minimum Height	9.5 inches
Maximum Height	18.5 inches

Summary

General Safety and Setup

General Safety Precautions

Study, understand, and follow all instructions; do not exceed capacity; use on level surfaces; support vehicle; use for intended purpose.

California Prop 65 Disclosure

Brass components contain lead, a chemical known to cause cancer and reproductive harm.

Setup Procedures

Read safety information and ensure load is removed from jack before proceeding.

Assembly Steps

Connect supports, chain hooks, washers, and wing nuts to the saddle.

Hydraulic System and Operation

Checking and Filling Hydraulic Fluid

Check oil level, fill to 1/4" below fill port, replace plug, and test operation.

Bleeding the Hydraulic System

Purge air by opening release valve, pumping handle, checking level, and closing valve.

Removing a Transmission

Check fluid, clear area, attach chain, raise jack, align saddle, secure transmission, lower jack.

Replacing a Transmission

Align jack, raise, guide transmission into place, secure, disconnect chain, lower jack.

Maintenance, Servicing, and Troubleshooting

Pre-Use Inspection and Testing

Inspect for loose hardware, leaks, damage, and test for proper operation before each use.

Periodic Maintenance

Inject grease into Zerk fitting and change hydraulic oil every three years.

Troubleshooting Guide

Resolve issues like jack not lifting, spongy pump, or oil leaks by checking valves, fluid, or bleeding.

Parts List and Diagram

Component Identification

List of all parts with part numbers, descriptions, and quantities.

Assembly Diagram

Visual representation of the transmission jack components and their assembly.