SPX OTC 1794A User Manual

Sheet No.
Issue Date: Rev. E Jan. 25, 2006
© 2004 SPX Corporation
Parts List & Operating Instructions Form No. 528220
Form No. 528220
Parts List &
Operating Instructions
for: 1794A
Air / Hydraulic
High Lift Transmission Jack
Max. Capacity: 1,000 lbs. at 90 PSI
The High Lift Transmission Jack is designed for the installation and removal of automobile transmissions.
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SPX Corporation
655 Eisenhower Drive
Owatonna, MN 55060-0995 USA
Phone: (507) 455-7000
Tech. Serv.: (800) 533-6127
Fax: (800) 955-8329
Order Entry: (507) 533-6127
Fax: (800) 283-8665
International Sales: (507) 455-7223
Fax: (507) 455-7063
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the last revisions
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SPX OTC 1794A Specifications

General

Category	Jacks
Model	1794A
Minimum Height	3.5 inches
Maximum Height	20.5 inches
Type	Service Jack

Summary

Transmission Jack Overview

Assembly Instructions

Initial Jack Assembly

Assemble casters, legs, handle, and saddle components to the main jack body.

Saddle Adjustment and Bracket Mounting

Adjust saddle angle and attach corner support brackets to the saddle board.

Chain Pack and Securing

Assemble chain pack bracket and use chains to secure the transmission.

Critical Load Securing Warning

Warning: Ensure transmission is secured by the restraint system before lifting.

Safety Precautions

General Safety Instructions

Study instructions, wear eye protection, inspect jack, use on level surface, adhere to capacity.

Fluid and Modification Guidelines

Use only approved hydraulic fluid; do not modify the jack.

Setup Procedure

Initial Valve Adjustment

Close metering valves, attach air, set lift speed with UP pedal and raising valve.

Setting Lowering Speed

Place a load, use DOWN pedal, and adjust lowering valve for comfortable speed.

Critical Setup Warning

Warning: Incorrect valve adjustment can cause rapid load drop and injury.

Bleeding Air from Hydraulic System

Air Bleeding Procedure

Tilt jack, open release valve, pump handle, close valve, and continue pumping.

Operating Instructions

Initial Setup and Air Stage Operation

Lift vehicle, position jack, connect air, and raise adapter using air stage to lock.

Load Securing and Hydraulic Stage

Center load, engage lock, use hydraulic stage to align, and secure with chains.

Transmission Removal and Lowering

Remove transmission, then slowly lower hydraulic and air stages.

Critical Air Cylinder Warning

Warning: Raise cylinder to mechanical lock before transferring load to prevent sudden drop.

Preventive Maintenance

Storage and Cleaning

Store in protected area, keep clean, and wipe cylinder columns regularly.

Inspection and Lubrication

Inspect jack before use for damage; lubricate moving parts monthly.

Maintenance and Troubleshooting

Lubrication and Fluid Requirements

Use medium weight grease and approved hydraulic jack oil. Do not use brake fluid.

Troubleshooting Common Issues

Addresses air leaks, cylinder not lowering, and hydraulic lift problems.