The M113 armored personnel carrier gearbox is an automatic hydromechanical transmission that ensures smooth gear shifting without driver involvement. The automatic transmission consists of a torque converter, planetary mechanisms, and hydraulic control system. The automatic gearbox significantly facilitates control of heavy tracked equipment in combat conditions.
The automatic transmission design is integrated with M113 transmission components and ensures power transmission from the engine to final drives. The hydraulic system uses special transmission oil that performs the functions of working fluid and lubricating material.
Main components of M113 automatic transmission
The torque converter transforms engine torque and transmits it to planetary gears through the turbine wheel. Planetary mechanisms provide gear ratio changes using friction packs. The hydraulic control unit distributes oil pressure to activate corresponding friction clutches.
The oil pump creates necessary pressure in the hydraulic system. The filter cleans transmission oil from wear products and contaminants. Planetary mechanism gears are made of high-strength steels with heat treatment. Gearbox interaction with running gear elements requires precise parameter coordination for optimal traction.
Common gearbox malfunctions
It should be made a rule to timely replace transmission oil and the hydraulic filter responsible for its cleaning. For example, the hydraulic filter for the Allison 200 transmission costs several thousand hryvnias, while the Allison 200 automatic transmission itself costs several million hryvnias and is a very scarce item.
Worn friction discs cause gear slippage and loss of traction under load. Symptoms include increased engine RPM without corresponding vehicle acceleration. A clogged oil filter reduces hydraulic system pressure, leading to untimely gear shifting.
Transmission oil leakage through worn seals reduces fluid level in the system. Insufficient oil causes gearbox overheating and accelerated parts wear. Contaminated oil with wear products acts as an abrasive and destroys gear surfaces.
Mechanical gear damage manifests as noise and vibrations. Hydraulic unit malfunctions lead to chaotic gear changes. Oil pump failure completely prevents automatic transmission operation.
Procedure for selecting automatic transmission parts
Selection of spare parts for the M113 gearbox requires precise determination of automatic transmission modification. Overhaul kits include friction discs, gaskets, seals, and O-rings for major repair. Catalog numbers help correctly identify components.
Main spare parts for the gearbox:
- Friction overhaul kits for restoring engagement in planetary mechanisms.
- Oil filters and pan gaskets for regular maintenance.
- Planetary gear sets for replacement after critical wear.
- Torque converters or their components for restoring torque transmission.
- Seals and gaskets for sealing gearbox shafts.
You can purchase spare parts through our website with a detailed description. Overhaul kit prices include all necessary parts for restoring automatic transmission operation. You can order transmission oil and filters together with spare parts for comprehensive maintenance.
Spare parts delivery throughout Ukraine
Our company organizes delivery of spare parts for the M113 gearbox throughout Ukraine. For warehouse items, we ensure shipment within 24 hours. Large components are transported with proper packaging.
We provide technical support for selecting spare parts and recommendations for automatic transmission repair.