BOCK FK40 Series - Maintenance; Maintenance Preparation

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As changing the shaft seal involves opening the refrigerant
circuit, this is recommended only if the seal is losing refriger-
ant. Replacing the shaft seal is described in the spare part
kit concerned.
Emptying the oil reservoir: The oil reservoir can be emptied
very simple without having to dismantle the coupling and/or
belt drive. It is recommended that this is done at the same
time as the air-conditioning maintenance and motor service.
To proceed, detach the oil hose from the bracket, remove the
sealing plug and drain the oil into a collecting vessel. After
emptying, reseal the oil hose and clamp it into the bracket.
Dispose of the used oil in accordance with national
regulations.
6.3 Shaft seal, emptying the oil reservoir
Fig. 16
6.1 Preparation
6.2 Work to be carried out
6| Maintenance
Oil change: In principle, an oil change is not mandatory if the system is correctly manufactured
and operated. However, based on decades of experience we recommend that the following oil
change/service work is carried out:
 - Firstoilchangeduringtherstmaintenanceofthevehicle.
- Then after every 5,000 operating hours, though no more than 3 years, clean the oil strainer
at the same time. If necessary, also empty the oil reservoir at the shaft seal.
Annual checks: Oil level, tightness of the compressor, running noise, pressures, temperatures,
function of auxiliary devices such as checking the capacity control.
WARNING Before starting any work on the compressor:
Switch off the compressor and secure it to prevent a restart.
Relieve compressor of system pressure.
 Preventairfrominltratingthesystem!
After maintenance has been performed:
Connect safety switch.
Evacuate compressor.
Release switch lock.