Operation The Viscofan coupling is a maintenance-free, hydraulic coupling which operates independent of temperature as well as infinitely variable. When the engine is started (cold…

Removal 1. Completely drain coolant (20- 010). 2. Remove radiator (20-420). 3. Unscrew fan. 4. Slacken V-belt and remove. Drain plug on cylinder crankcase 5.…

Disassembly 1. Press-off impeller. For this purpose, place pressing off disc between impeller and bearing housing. 2. Apply light hammer blows at several points between…

Note On engine 617.91 2, from engine end No. 046716 to 061708 with manual transmission and from 043754 to 058448 with automatic transmission, the water…

Removal 1. Completely drain coolant (20-010) 2. Unscrew fan. 3. Slacken V-belt of alternator and remove. Drain plug on cylinder crankcase 4. On vehicles with…

A. Model 1 15.1 and 123.1 ( 1st version up to February 1979) Removal 1. Drain coolant. 2. Disconnect hose on thermostat housing cover. 3.…

A. De-oiling 1. Completely drain cooling system. 2. Remove thermostat element and set heater lever to warm. 3. Fill cooling system with a 5 %…

Self made tool for vehicles with automatic climate control Note A thermostat housing with automatic vent is installed on model 123.1 starting February 1979 (2nd…

A. Model 115.1 and 123.1 (version up t o February 1979) The thermostat layout on model 123.1 ( 1 s t version) differs. On vehicles…