Caterpillar — Hoses and Clamps - Inspect/Replace
Maintenance
From a Caterpillar owner's manual covering: C3.3, C3.3 Rental Generator Set, C4.4, C4.4 Rental Generator Set, D4D1-Up, GLE1-Up, N3X1-UP, N4R1-Up, N4X1-Up, X3B1-UP, XYC1-Up, XYD1-Up. Check it applies to your exact model before use.
Applies to: Caterpillar C3.3, Caterpillar C4.4
Before you start
- Pressurized System: Hot coolant can cause serious burns
- Do not bend or strike high pressure lines
- A constant torque hose clamp can be used in place of any standard hose clamp of the same size
Procedure
- Inspect all hoses for leaks caused by cracking, softness and loose clamps.
- Replace hoses that are cracked or soft. Tighten any loose clamps.
- Stop the engine. Allow the engine to cool.
- Loosen the cooling system filler cap slowly to relieve pressure. Remove cap.
- Drain the coolant to a level below the hose that is being replaced.
- Remove the hose clamps and disconnect the old hose.
- Replace the old hose with a new hose.
- Install the hose clamps with a torque wrench.
- Refill the cooling system.
- Clean and inspect the filler cap gaskets; replace cap if damaged. Install cap.
- Start the engine. Inspect the cooling system for leaks.
Tools required
- Torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Refer to SENR3130 Torque Specifications
Full service-parts list: Caterpillar C3.3 →, Caterpillar C4.4 →
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.