4T4802 WIPER-ROD Caterpillar parts
651E, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D
Rating:
Alternative (cross code) number:
CA4T4802
4T-4802
4T4802
CA4T4802
4T-4802
4T4802
Weight: 0.15 pounds 0 kg.
TRUCK, WHEEL SCRAPER,
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Compatible equipment models: 4T4802:
Information:
D346, D348, D349 EnginesReference: Caterpillar Tool Guide, Miscellaneous Tools Section, "Thread Inserts (Heli-Coil), Taps and Installation Tools For Repairing Damaged Threads".Description of Change: This article supersedes a similar article in Engine News, October, 1986, Page 3. Put a mark through the article "Longer Adjusting Screw and Jam Nut Available For Use In Valve Rocker Arms" and add a note referring to this article. The 8T8907 Nut should not be used with the 7C1644 Screw Assembly. Instead, use thread inserts (Heli-Coils) to repair rocker arms with worn or loose threads. Heli-Coils may be used with either the longer, 7C1644 Screw Assemblies or the shorter 2S323 Screw Assemblies, which are being reinstated for parts service. Use of Heli-Coils in worn rocker arms will extend the serviceable life of the rocker arms while avoiding the expense of buying special longer screw assemblies and jam nuts.
There have been reports of excessive wear in the threads of the 1P7304 Rocker Arm and 2S323 Screw Assembly. These are a part of the 1P7310 Rocker Arm Assembly shown in the illustration. The excessive thread wear may cause valve misadjustment and may lead to valve or rocker arm failure.
1P7310 Rocker Arm Assembly.The repair announced in the previous article should not be used because the 7C1644 Screw Assembly is hardened over its entire length. Use of a jam nut with this screw assembly may cause a brittle fracture in the screw assembly when either the jam nut is tightened down or shortly after the repaired engine is put back in service.
Adaptable To: Worn or loose rocker arms can be repaired on all the above engines when the following procedure is used. Procedure To Check For Excessive Thread Wear
This should be done either at engine overhaul time or if valve adjustment has been a problem. Use the Service Manual as a reference.1. Remove the camshaft housing.2. Remove the 2S323 Screw Assembly from the 1P7304 Rocker Arm. It is necessary to remove the screw assembly so the 2S3992 Spring and 2S3991 Plunger in the rocker arm do not put a side force on the screw assembly. See illustration.3. Install the screw assembly in the rocker arm from the opposite side that it was removed.4. Check for excessive movement between the threads of the screw assembly and the rocker arm. Compare the movement with a new rocker arm assembly to determine what is acceptable.5. If excessive movement is felt, replace the screw assembly with a new one and repeat the test.6. If there is excessive movement using the new screw assembly, it will be necessary to install a Heli-Coil in the worn rocker arm. Install 8T2737 Inserts (7/16"-20 Thread) using the tools and procedure given in the Caterpillar Tool Guide.
There have been reports of excessive wear in the threads of the 1P7304 Rocker Arm and 2S323 Screw Assembly. These are a part of the 1P7310 Rocker Arm Assembly shown in the illustration. The excessive thread wear may cause valve misadjustment and may lead to valve or rocker arm failure.
1P7310 Rocker Arm Assembly.The repair announced in the previous article should not be used because the 7C1644 Screw Assembly is hardened over its entire length. Use of a jam nut with this screw assembly may cause a brittle fracture in the screw assembly when either the jam nut is tightened down or shortly after the repaired engine is put back in service.
Adaptable To: Worn or loose rocker arms can be repaired on all the above engines when the following procedure is used. Procedure To Check For Excessive Thread Wear
This should be done either at engine overhaul time or if valve adjustment has been a problem. Use the Service Manual as a reference.1. Remove the camshaft housing.2. Remove the 2S323 Screw Assembly from the 1P7304 Rocker Arm. It is necessary to remove the screw assembly so the 2S3992 Spring and 2S3991 Plunger in the rocker arm do not put a side force on the screw assembly. See illustration.3. Install the screw assembly in the rocker arm from the opposite side that it was removed.4. Check for excessive movement between the threads of the screw assembly and the rocker arm. Compare the movement with a new rocker arm assembly to determine what is acceptable.5. If excessive movement is felt, replace the screw assembly with a new one and repeat the test.6. If there is excessive movement using the new screw assembly, it will be necessary to install a Heli-Coil in the worn rocker arm. Install 8T2737 Inserts (7/16"-20 Thread) using the tools and procedure given in the Caterpillar Tool Guide.
Caterpillar parts catalog:
Parts wiper Caterpillar catalog:
5T6550
WIPER GP-WINDOW
784B, 785, 785B, 789, 789B, 793, 793B, 793C
784B, 785, 785B, 789, 789B, 793, 793B, 793C
1370023
WIPER GP-WINDOW
784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 793C, 793D
784C, 785, 785B, 785C, 785D, 789, 789B, 789C, 789D, 793C, 793D
9X7368
WIPER-ROD
785, 785B, 789, 789B, 789C, 789D, PM-201, PM-565, PM-565B
785, 785B, 789, 789B, 789C, 789D, PM-201, PM-565, PM-565B
4T4805
WIPER-ROD
785, 785B, 785C, 785D
785, 785B, 785C, 785D
1U4625
WIPER-ROD
785, 785C
785, 785C
4T4130
WIPER-ROD
789
789
3G8505
WIPER-ROD
657E
657E
3J5148
WIPER
184
184
3J8910
WIPER
183, 633, 633D, 651, 666
183, 633, 633D, 651, 666
3J0647
WIPER
184
184
4M7671
WIPER
191, D8H
191, D8H
2K7114
WIPER
955C
955C
1502612
WIPER
631E, 631G, 637E, 637G
631E, 631G, 637E, 637G
1412276
WIPER
621F, 621G, 627F, 627G
621F, 621G, 627F, 627G
1412275
WIPER
621F, 621G, 627F, 627G
621F, 621G, 627F, 627G
1175242
WIPER
910E, 910G, IT12B, IT14F
910E, 910G, IT12B, IT14F
9T3486
WIPER
615C, FB518, IT18F
615C, FB518, IT18F
1U2708
WIPER-ROD
631D, 631E, 637D, 637E
631D, 631E, 637D, 637E