Description
CAT 3T-1181 SLEEVE
| CAT 3T-1181 SLEEVE |
| CAT 319-3477 TRUNNION-GD |
| CAT 126-0785 Output Planet Carrier Roller |
| CAT 340-8107 RETAINER |
| CAT 464-8391 BEARING AS-C |
| CAT 361-1902 BEARING |
| CAT 460-7269 BUSHING |
| CAT 316-8076 BUSHING |
The CAT 3T-1181 (3T1181) is a Caterpillar original equipment manufacturer (OEM) engine fuel pump/gear chamber positioning sleeve. It is used for positioning the transmission system of 3406, 3306, and 3114 series engines, ensuring shaft coaxiality and installation accuracy. It is a key positioning component for power transmission.
Core Parameters (Original Manufacturer Nominal)
Item Details
Part Model: CAT 3T-1181 (3T1181) Positioning Sleeve
Material: 40Cr alloy steel, tempered and quenched, blackened surface, hardness HRC32-36, wear-resistant and corrosion-resistant
Key Dimensions: Inner diameter 12.7mm (0.5in), outer diameter 25.4mm (1in), total length 96.5mm (3.8in), no flange, chamfered ends 1×45°
Applicable Objects: Suitable for fuel pump/gear chamber shaft positioning in engines such as 3406, 3406B/C, 3306, 3114, 3408, and 3412; common complete machines: Caterpillar D10T bulldozer, 777 mining truck, 3406B generator set
Functional Characteristics: Positioning accuracy ±0.01mm, radial load ≤2kN, temperature resistance -40℃ to 100℃, suitable for continuous operation.
Installation Method: Clearance fit, shaft end insertion installation, positioned by the shaft shoulder, no additional fasteners required.
Single Weight: Approx. 0.05kg (0.1lbs)
Suitable Applications:
Installation and Positioning: Installed between the engine gear chamber and the fuel pump drive shaft, or at the front end of the camshaft, providing radial support and axial positioning for the shaft system, ensuring coaxiality of transmission components, and preventing radial runout and vibration of the shaft system.
Operating Conditions: Suitable for heavy-duty construction machinery, mining equipment, generator sets, etc., ensuring stable power transmission between the fuel pump and engine, reducing transmission wear, and avoiding abnormal fuel injection due to positioning deviations.
Compatibility: Commonly used with 3T-1182 locating pins and 127-0712 bolts. During replacement, simultaneously check the wear of the bushing inner diameter, surface damage, and radial runout of the shaft system.
Installation and Maintenance Points
Installation Steps:
Clean the mounting surfaces of the shaft and bushing to remove oil, rust, and impurities;
Smoothly insert the bushing into the shaft end, ensuring a proper fit with the shaft shoulder without jamming;
Check that the shaft rotates freely with radial runout ≤0.03mm.
Maintenance Cycle: Inspect every 2000 hours under standard operating conditions; shorten to 1000 hours under harsh operating conditions (high dust, heavy load), focusing on checking for inner diameter wear, surface scratches, and deformation.
Replacement Criteria: If inner diameter wear exceeds 0.05mm, or if surface cracks or deformation appear, the shaft must be replaced and cannot be repaired.
