Maintenance and Service
Pump distributor gears (PDG)
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7.1.7 Other maintenance work on the engine
During each maintenance service on the diesel engine, the following additional work
must be carefully performed in compliance with the Volvo maintenance regulations
(see maintenance booklet for the engine):
– Leak and condition examination of all pipes and hoses of the engine.
– Check the suction line between air filters and engine, cooling and heating system
for condition and leaks.
– Checking all lines and hoses for undamaged condition as well as chafe-free and
proper routing and fastening.
– Check all hose clamping collars, flanged connections and air intake manifold for
tight seat.
7.2 Pump distributor gears (PDG)
The pump distributor gears is directly flanged to the diesel engine and transfers
engine power to the individual hydraulic pumps.
The oil level of the pump distributor gears must indispensably be checked daily. Check
the oil level, before you start the diesel engine! When the diesel engine has been
started, checking of the oil level is no longer possible.
To read the oil level, the machine must be standing on even and level ground and the
engine must have been shut off for at least 5 minutes. When the oil level rises or falls
without evident reason, indispensably call in a customer service mechanic.
The oil level can be read at the inspection glass (2). It must be within the inspection
glass range (in no case above the top edge of the inspection glass!).
The inspection glass is located on the left side of the pump distributor gears.
The gear oil is cooled by a separate oil cooler (See Page 390).
(1) Filler screw
(2) Inspection glass
(3) Oil drain valve
Optimal oil level
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