The internal hydraulic system operates at a high threshold—typically around 80 PSI . A fluctuating or flickering pressure gauge is an immediate indication of low oil levels or aerated fluid.
The contains a "Red Zone" safety appendix. Pay attention to these two critical warnings: tmp gearbox workshop manual top
The exploded views often include part numbers, making it easy to identify the correct bearings, seals, or gears needed for repairs, reducing downtime. 4. Safety and Troubleshooting The internal hydraulic system operates at a high
Crucially, standard TMP gearboxes are calibrated for right-hand (clockwise) rotating engines. However, specific variations built for Ruston Hornsby or Coventry engines feature a modified internal oil pump to accommodate opposite rotations. These specialty units feature a serial identification code starting with . Always verify the model number on the identification plate located at the rear of the box before ordering components from the Thamesway Marine Products Spare Parts List . 2. Essential Maintenance & Fluid Requirements Pay attention to these two critical warnings: The
TMP produces varying levels of documentation. The standard user manual covers fluid changes and basic installation. The , however, is the gold standard. It is the same manual used by TMP-certified rebuild centers.
Symptom: Transmission jumps out of third gear under load. Standard manual advice: Replace shift fork. Top manual truth: The manual reveals a hidden bulletin—a worn detent spring guide bushing. The "Top" guide shows how to drill a 2mm oil relief hole in the bushing. This permanent fix is not listed anywhere else.