Service Bulletin
Volvo Trucks North America
Greensboro, NC USA Trucks
Date Group No. Page
3.2007 220 32 1(6)
Lubrication and Oil System
D16F
Lubrication and Oil System
W2005772
This information covers the design and function of the lubrication and oil system on
the Volvo D16F engine.
Contents
• “Lubrication and Oil System” page 2
Note: Information is subject to change without notice.
Illustrations are used for reference only and may differ slightly from the actual
vehicle being serviced. However, key components addressed in this information are
represented as accurately as possible.
PV776-20177150 USA22729
Volvo Trucks North America Date Group No. Page
Service Bulletin 3.2007 220 32 2(6)
Design and Function
Lubrication and Oil System
General
The engine has forced lubrication provided by a gear
pump (1) positioned at the rear and driven by the
crankshaft. The filter housing (2) is bolted to the right side
of the engine and contains two full-flow filters (3) and a
bypass filter (4). After passing through the full-flow filters,
the oil moves to the cylinder block, where it is distributed
through galleries to engine points in need of lubrication.
The flat oil cooler (5) is assembled under a cast aluminum
cover in the right side of the engine block.
The purpose of the lubrication system is to lubricate the
movable engine parts in order to keep friction and wear to
a minimum. The oil transports carbon and other residues
stuck on the cylinder walls after combustion. The oil also
functions as a sealer, for the cylinder liners have been
projected in such a way that a thin layer of oil is always
kept in its walls. This makes it easier for the piston rings
to seal the combustion chamber. The oil also cools
the engine and, at the same time, reduces the sounds
produced by the engine.
T2020857
The oil flow in the engine is controlled A. Bypass valve for oil cooler E. Opening valve for piston cooling
by seven valves located in the oil filter B. Safety valve (marked violet) F. Overflow valve for the bypass
housing. C. Reduction valve (marked blue) filter
D. Control valve for piston cooling G. Bypass valve for full-flow filter
Volvo Trucks North America Date Group No. Page
Service Bulletin 3.2007 220 32 3(6)
Operating Principles of the Lubrication System
T2020859
A. Bypass valve for oil cooler
B. Safety valve (marked violet)
C. Reduction valve (marked blue)
D. Control valve for piston cooling
E. Opening valve for piston cooling
F. Overflow valve for bypass filter
G. Bypass valve for full-flow filter
The lubrication oil pump (1) forces the oil through the
pressure pipe (2) to the drilled channels in the cylinder
block. The oil is then channeled to the oil cooler (3) and
the filter housing (4). After being filtered in both full-flow
filters (5), the oil is channeled to the cylinder block
main lubrication channel (6) for distribution to all engine
lubrication points. The lubrication by the cylinder head is
through a drilled channel up to the VCB valve (7).
The air compressor (8) and the turbocharger (9) are
lubricated through external braided oil lines. The
turbocharger oil is filtered by the bypass filter (10). The
piston cooling oil is filtered by the full-flow filters and is
forced into the cylinder block piston cooling channel.
From the piston cooling channel, the oil is sprayed toward
the underside of the piston through a piston cooling
nozzle (11).
Volvo Trucks North America Date Group No. Page
Service Bulletin 3.2007 220 32 4(6)
Extreme Cold Start
Extreme cold start is considered to be when starting at
temperatures below -20 C (-4 F). The safety valve (B)
opens to protect the oil pump against the high pressure
which occurs when the oil viscosity is too high. The
reduction valve (C), bypass valve (A) and piston cooling
valve (E) open due to the high viscosity.
Driving at Low Engine RPM
When driving at low engine rpm with an engine that is
at operating temperature, the reduction valve (C) partly
opens to maintain the oil pressure within the correct
values. The piston cooling valve (E) is open. The piston
cooling control valve (D) has begun to control the flow to
the piston cooling channel.
Driving at High Engine RPM
When driving at high rpm with an engine running at
operating temperature, valves (C) and (E) are open. In
addition, the piston cooling control valve (D) is lifted and
opened slightly by the increased oil pressure.
Blocked Oil Filters
If a full-flow filter becomes blocked, the bypass valve
(G) opens and unfiltered oil is pumped into the engine
lubrication system. If the bypass filter becomes blocked,
valve (F) opens so that the turbocharger is supplied with
oil filtered through the full-flow filters.
Idling, Hot Engine
At low engine rpm and with the engine at operating
temperature, all valves are closed.
W2005680
Volvo Trucks North America Date Group No. Page
Service Bulletin 3.2007 220 32 5(6)
A more detailed picture of the filter housing and valve
locations is shown. The arrows in the channels show the
oil flow direction between the oil filter housing and the
cylinder block.
Oil Pump and Cooler
T2020860
The oil pump is located at the rear of the engine and is
bolted to the cylinder block lower surface. It is driven
by a gear directly from the crankshaft gear. The pump
gear is beveled for low noise levels and the shafts are
mounted in bearings directly in the pump housing, which
is manufactured of aluminum.
The strainer (1) is made of plastic and is bolted on the
engine stiffening frame. The suction pipe (2) is made of
steel and is sealed at the ends with rubber seals. The
pressure pipe (3) is manufactured of steel and is attached
to the cylinder block with a fitting.
The oil cooler is bolted directly to the cylinder block under
the oil cooler side cover and is completely surrounded
by coolant.
Volvo Trucks North America Date Group No. Page
Service Bulletin 3.2007 220 32 6(6)
Piston Cooling System
T2020861
Shown is the oil flow for the piston cooling system when
the valve (E) has opened and valve (D) balances the oil
flow to the piston cooling channel. The piston cooling
nozzle is aligned so that the oil jet hits the under side of
the piston crown.
By regulating the piston cooling flow using a control valve,
an optimized piston cooling system can be achieved with
a constant flow of oil independent of engine rpm.
