Description
CAT 342-9969 Belt Guard Threaded Insert
| CAT 342-9969 Belt Guard Threaded Insert |
| CAT 177-4146 Bearing – Cup(Debris Resistant) |
| CAT 449-5085 Tapered Roller Bearing |
| CAT 6K-8088 Bearing-Needle Roller |
| CAT 569-4230 Single Row Tapered Roller Bearing |
| CAT 581-9080 Bearing Retainer |
| CAT 254-0024 Fan Drive Support Pillow Block Bearing |
| CAT 276-4441 Idler Bearing Cap |
CAT 342-9969 is a Caterpillar Belt Guard Thread Insert, primarily used for repairing and reinforcing the threaded holes of engine/transmission system belt guards. It is suitable for small loaders, excavators, and other construction machinery. The following is structured and precise information.
Core Parameters (Professional Version)
Project Details
Basic Attributes Model 342-9969, Helical Thread Insert, used for repairing threaded holes in aluminum alloy/plastic housings of belt guards. Quantity per unit: 1–4 pieces (depending on the number of fixing points on the guard). Strengthens threaded connection and prevents stripping.
Key Dimensions Commonly compatible threads are M8×1.25 (metric coarse thread) or 5/16″-18 (imperial coarse thread). Outer diameter matches the mounting hole (e.g., M8 corresponds to a φ8.4 mm mounting hole). Length is typically 12–18 mm. Thread accuracy is 6H. Material is stainless steel 304/316 or phosphor bronze, with surface passivation treatment.
Performance Characteristics Tensile strength ≥1000 MPa, corrosion resistant, suitable for vibration conditions, repairs worn/stripped threaded holes, extends housing service life. After installation, thread strength can reach 1.5–2 times that of the original thread. Suitable temperature: -50℃ to + 200℃
Compatible Models: Cat 906/907/908 mini loaders, 301.7/302.7 mini excavators, 420/430/442 mini excavators, D3K/D4K mini bulldozers, and some engine belt covers (e.g., 377-7681 air conditioning belt cover)
Installation and Application Points:
**Before installation, tap the thread with a special tap to ensure the pilot hole is clean and free of chips. The perpendicularity deviation of the threaded hole should be ≤0.1 mm to prevent thread misalignment after installation.
**Use an installation tool to smoothly screw the insert into the pilot hole, ensuring the insert end face is flush with the housing surface, without protrusions or depressions.**
**After installation, check the thread gauge for passability to ensure the bolt can be screwed in smoothly. The torque should be as per the manufacturer’s manual (e.g., recommended torque 18–22 N・m for M8 bolts).
Under vibration conditions, it is recommended to check the threaded connection every 1500 hours. If loose, retighten. Replace the entire insert if damaged.
