05-13-2026, 05:07 PM
Doug
We had the same issue on 1241. It ended up needing a replacement hydraulic pump (and splined gear adapter on a Cat C15). One quick way to see if the hydraulic pump is performing as it should at idle is to unplug the electrical connector going to the hydraulic divider block that splits hydraulic fluid between the radiator fan and the power steering with the engine running. When disconnected the two stage radiator fan should go to hi and noticeably increase in speed. Totally different coach to drive when it steers and cools as designed.
We had the same issue on 1241. It ended up needing a replacement hydraulic pump (and splined gear adapter on a Cat C15). One quick way to see if the hydraulic pump is performing as it should at idle is to unplug the electrical connector going to the hydraulic divider block that splits hydraulic fluid between the radiator fan and the power steering with the engine running. When disconnected the two stage radiator fan should go to hi and noticeably increase in speed. Totally different coach to drive when it steers and cools as designed.