CAT 1H7339 SEAL for 345C Caterpillar Part - WSTPARTS
1H7339 SEAL is a Drivetrain component engineered for Caterpillar 345C, 345B and 365B machines, built to match original factory specifications. It is categorized under Drivetrain. Every unit is fitment-verified before dispatch. Manual reference: 330C: FRAME AND BODY, group 142-5491, page 424; 336D: UNDERCARRIAGE, group 136-2422, page 320.
1H7339 SEAL for Caterpillar 345C — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement SEAL (Part # 1H7339). Designed for CAT 345C, 345B, 365B, 336D, 330C, 330D, 3406C, C32, 345D equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 345C, 345B, 365B, 336D, 330C, 330D, 3406C, C32, 345D
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 1H7339 |
| Product Name | SEAL |
| Brand | CAT |
| Applicable Models | 345C, 345B, 365B, 336D, 330C, 330D, 3406C, C32, 345D |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1H7339 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.
| Machine | System | Group No. | Manual Page |
| 330C | FRAME AND BODY | 142-5491 | p.424 |
| 330D | FRAME AND BODY | 142-5491 | p.364 |
| 336D | UNDERCARRIAGE | 136-2422 | p.320 |
| 3406C | BASIC ENGINE | 287-3561 | p.139 |
| 345B | BASIC ENGINE | 136-4307 | p.44 |
| 345C | FRAME AND BODY | 178-7293 | p.385 |
| 365B | BASIC ENGINE | 136-4307 | p.40 |
| C32 | BASIC ENGINE | 419-9352 | p.66 |
System Notes — FRAME AND BODY
The frame and body group covers the main frame, counterweight, fenders, steps, handrails, access doors, panels and the mounting hardware that ties them together. It carries every load the machine generates and every load the attachment imposes back into the structure. Cracks almost always start at a weld toe or a bolt hole where a mounting has worked loose, and a loose guard or step is both a structural and a safety issue. Parts in this group are replaced after impact damage, after crack repair, or when fasteners no longer hold torque because the hole has elongated.
System Notes — UNDERCARRIAGE
The undercarriage group covers tracks, shoes, links, bushings, rollers, idlers, sprockets, track tensioners and the recoil hardware. It carries the whole machine weight and transmits drive force to the ground, and it is normally the single largest wear cost on a tracked machine. Wear is a system: a worn sprocket accelerates chain wear, a loose track pounds the bushings, and a seized roller flat-spots the link it runs on. Parts here are replaced on measured wear — bushing diameter, shoe height, roller flange — and replacing one component out of phase with the rest usually shortens the life of both.
FAQ
Is 1H7339 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT 345C.
Genuine vs OEM replacement — what is the difference?
Genuine CAT parts carry an anti-counterfeit label. OEM equivalents are built to the same specifications, bench-tested and supplied with full warranty at a better price.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a 12-month warranty.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
