Procedure For Tightening of SAE Plugs on Certain Flywheel UPS Products{1156, 4480} Caterpillar

Uninterruptible Power Supply:

ES12F (S/N: CZE1-UP)

UPS 1000S (S/N: CZS1-UP)

UPS 1000Z (S/N: EDZ1-UP)

UPS 120 (S/N: CNK1-UP)

UPS 1200S (S/N: CZT1-UP)

UPS 1200Z (S/N: HDR1-UP)

UPS 150 (S/N: CPC1-UP)

UPS 250 (S/N: BEE1-UP; CNM1-UP; APZ1-UP)

UPS 300 (S/N: CNJ1-UP)

UPS 301 (S/N: CSY1-UP)

UPS 500 (S/N: CSE1-UP)

UPS 600 (S/N: CTX1-UP)

UPS 750 (S/N: CPM1-UP; AD21-UP; CD71-UP)

UPS 900 (S/N: CRY1-UP)

UPS500G (S/N: TYD1-UP)

UPS600G (S/N: DLD1-UP)

Introduction

This Special Instruction provides the procedure for tightening of SAE plugs on certain Flywheel Uninterruptible Power Supply.

Important Safety Information

Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.

A person must be alert to potential hazards. This person must also have the necessary training, skills, and tools in order to perform these functions properly.

Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance of a potential hazard.

Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. Avoid using a tool, a procedure, a work method, or operating technique that is not recommended by Caterpillar. If used, ensure the safety of the operating personnel and others.

Ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance, or the repair procedures.

Tightening Procedure

Perform the following steps for proper torquing of SAE plugs.

1. Apply a light coating of vacuum grease to the O-ring.

2. Heat the O-ring a little (using heat gun or hair drier) to make it more pliable, then install O-ring on the plug.

3. Pre-grease the plug before installing the O-ring, so it has grease on both sides of the O-ring.

4. Install the plug by hand to where the plug seat.

5. Then half turn the plug slowly and wait for 1 to 3 minutes.

6. Repeat step 5 until the plug seats firm.

7. At that point wait for half hour, then torque the plug to the required 47.6 N·m (35 lb ft).