Use Conductive Fasteners for Electrical Grounding on All Cat Products {7553}
- Caterpillar Products
- All
Show/hide table
Illustration 1 | g03012597 |
Example of a bolt with a black coating that is a poor electrical conductor |
Show/hide table
Illustration 2 | g06289879 |
Example of a bolt with a gray coating that is a poor electrical conductor |
To minimize damage from rust and corrosion, many fasteners have black or gray coatings that resist electrical conductivity in addition to resisting corrosion. Do not use such fasteners for electrical terminals or electrical grounding.
Show/hide table
Illustration 3 | g06289950 |
Example of a bolt with a shiny or metallic silver-colored zinc plating that is a good electrical conductor |
Fasteners that provide good electrical conductivity have a shiny or metallic silver-colored zinc plating.
Direct contact between terminals or a terminal-to-ground boss is recommended. Refer to Illustration 4
Show/hide table
Illustration 4 | g03012656 |
(1) Stud
(2) Nut (3) Washer (4) Ring terminal (5) Boss |
Table 1 lists some nuts and washers that are commonly used for electrical grounds. The low torque is recommended so that the ring terminals are not damaged.
Show/hide table
Fastener | Size | Low Torque |
5C-2890 Nut | M6 | |
1A-8912 Washer | ||
5C-7261 Nut | M8 | |
8F-7242 Washer | ||
8T-4133 Nut | M10 | |
7P-1695 Washer | ||
8T-4244 Nut | M12 | |
4B-4280 Washer |
Caterpillar Information System:
336, 336 GC and 340 Excavator Systems Pump Lines
336, 336 GC and 340 Excavator Systems Track Adjuster and Recoil
336, 336 GC and 340 Excavator Systems Fuel Tank
336, 336 GC and 340 Excavator Systems Fuel Tank and Mounting
336, 336 GC and 340 Excavator Systems Front Lines
336, 336 GC and 340 Excavator Systems Suction Fan
336, 336 GC and 340 Excavator Systems Position Sensor and Mounting
301.5, 301.6, 301.7CR, 301.8, 302CR Mini Hydraulic Excavators Machine System Stick
336, 336 GC and 340 Excavator Systems Manifold and Reducing Valve (Pilot Oil)
336, 336 GC and 340 Excavator Systems Swing Gear and Bearing
336 and 336 GC Excavator Fuel Tank Water and Sediment - Drain
336 and 336 GC Excavator Engine Air Filter Primary and/or Secondary Element - Replace
336 and 336 GC Excavator Swing Drive Oil - Change
301.5, 301.6, 301.7 CR, 301.8, and 302 CR Mini Hydraulic Excavator Machine System Boom Cylinder
336 and 336 GC Excavator Swing Drive Oil Level - Check
336, 336 GC and 340 Excavator Systems Hydraulic Oil Cooler Lines Group
336 and 336 GC Excavator Swing Drive Oil Sample - Obtain
336, 336 GC and 340 Excavator Systems Hydraulic Oil Cooler Lines Group
336 Excavators (Powered by C9.3 Tier 4 Engine) Engine Supplement DEF Injector and Mounting - Remove and Install
301.5, 301.6, 301.7 CR, 301.8, and 302 CR Mini Hydraulic Excavator Machine System Boom Cylinder - Swing Boom
301.5, 301.6, 301.7 CR, 301.8, and 302 CR Mini Hydraulic Excavator Machine System General Information (Stick System)
301.5, 301.6, 301.7 CR, 301.8, and 302 CR Mini Hydraulic Excavator Machine System Control Valve (Stick Lowering)
301.5, 301.6, 301.7 CR, 301.8, and 302 CR Mini Hydraulic Excavator Machine System Stick Cylinder
336 Excavators (Powered by C9.3 Tier 4 Engine) Engine Supplement Nitrogen Oxide Sensor - Remove and Install