New Spring Assemblies Are Now Used On Certain C4.4 Generator Sets {7274} Caterpillar


New Spring Assemblies Are Now Used On Certain C4.4 Generator Sets {7274}

Usage:

C4.4 MZT
Generator Set
C4.4 GEN SET (S/N: MZT1-UP)

Introduction

Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.

The 444-6016 Gas Spring As may fail to support the door properly. The 135N gas springs are inadequate at certain ambient temperatures. Replace the 444-6016 Gas Spring As with new 495-9214 Gas Spring As. This will require installation of extra components from the 495-0159 Lift Gp.

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 should also have the necessary training, skills, and tools to perform these functions properly.

Safety precautions and warnings are provided in this instruction, on the product, and in this products Operation and Maintenance Manual (OMM). 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 that might involve a potential hazard.

Therefore, the warnings in this publication, the warnings that are on the product, and the warnings that are in the OMM are not all inclusive. If a tool, a procedure, a work method, or operating technique that is not recommended by Caterpillar is used, the user must ensure that it is safe for the user and for other people to use.

The user should ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance, or the repair procedures that are used.

Required Parts

Table 1
Required Parts 
Item  Qty  Part Number  Part Description 
142-4901  Screws 
208-6176  Ball Stud 
495-0160  Angle 
495-0161  Angle 
495-0162  Bracket As 
495-9214  Gas Spring As 
344-5674  Nuts 
8T-4189  Bolts 
8T-4224  Hard Washers 

Installation Procedure

Following is the rework procedure for the serviceability improvements:

  1. Remove springs and all hardware securing the components from enclosure and discard.


    Illustration 1g06031458
    Front view

  2. Install two brackets (2) to door using four screws (1).


    Illustration 2g06031490
    Bottom view

  3. Install one left side angle (3) to left side of enclosure opening. Secure with two bolts (8), four washers (9), and two nuts (7).

  4. Install one left side angle (4) to right side of enclosure opening. Secure with two bolts (8), four washers (9), and two nuts (7).

  5. Install one stud-ball (2) to the left side angle (3) as shown in Illustration 2. Secure with one nut (7).

  6. Install one stud-ball (2) to the right side angle (4). Secure with one nut (7) as shown in Illustration 2.


    Illustration 3g06031497
    Left side view

  7. Install two springs (6) to the left and right side using previously installed hardware.

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