Fact Sheet

Fact Sheet
The CS43B-O is a drag-type clutch with a single friction
disc that is 430 mm in diameter.
A drag-type clutch is disengaged when the release bearing
pulls the centre of the diaphragm spring outward. This
design makes the clutch easy to use and makes the
engagement action light and progressive when driving in
close quarters. Single discs are particularly suitable for
driving with few starts.
The purpose of the clutch is to transfer power from the
engine to the gearbox, but it also absorbs variations in
torque from the engine.
An inspection hole for range-/splitter gearboxes simplifies
monitoring disc wear. There is a damper located at the
centre of the clutch disc that consists of a number of
torsional springs attached in such a way that the centre of
the disk can twist slightly in relation to the linings. The
springs absorb any jolts, which protects components in the
driveline and increases their service life.
Clutch
CS43B-O
The CS43B-O has friction linings made of a heatresistant,
asbestos-free material. The pressure plates and
flywheel have great heat absorbing capacity and the disc
linings can withstand high temperatures. This contributes
to excellent durability and low maintenance costs.
The following features characterize the CS43B-O:
• The clutch fork for range-/splitter gearboxes has a
spherical bearing in the clutch casing, which enables
the fork to cope with uneven loads and to ensure good
disengagement.
• A drag-type clutch requires low disengagement forces
and provides good manoeuvrability. A single disc is
best suited for driving with few starts.
• A large friction area offers good durability, which means
good profitability.
• An inspection hole for range-/splitter gearboxes
simplifies monitoring disc wear.
• The friction disc has asbestos-free linings, and
cushioning pads that distribute pressure evenly over
the entire surface.
• The clutch consists of few parts, which results in low
weight, and low wear and maintenance.
Specifications
Designation ................................................... CS43B-O
Type......................................... Single, drag-type clutch
Type of disc .................................................... Dry disc
No. of discs ................................................................ 1
Disc diameter ..................................................430 mm
Disc damper’s diameter (A) ............................. 212 mm
Disc damper’s diameter (B)..............................232 mm
Disc damper’s diameter (C) ............................. 254 mm
Total friction surface of the disc (A,B) ........... 2000 cm 2
Total friction surface of the disc (C) .............. 1842 cm 2
Weight including disc (A) ................................. 46.8 kg
Weight including disc (B) .................................. 47.9 kg
Weight including disc (C) ................................. 46.9 kg
Ref: ............................. (A) = Engine torque

Fact Sheet
Easy-to-use, single disc
clutch
CS43B-O consists of a friction disc
(1), pressure plate (2), and a release
bearing (3). The disc has a hub with
inner splines. The hub is located on
the gearboxes’ input shaft, which has
corresponding outer splines. This enables
the disc to slide along the shaft.
This design offers good manoeuvrability.
3
2
Drag-type clutch for
smooth operation
In the engaged position, the diaphragm
spring, a “fan spring” (1) , presses the
pressure plate (2) , which in turn
engages the clutch. When the clutch
is engaged, power from the engine is
transferred from the flywheel (3) via
the friction disc (4) through the hub
(5) to the gearboxes’ input shaft (6).
When the clutch pedal is depressed,
force is transferred to a fork (7) that
pulls the release bearing (8) rearward
towards the gearbox.
The release bearing pulls the centre of
the diaphragm spring, removing the
pressure on the disc. The disc stops
rotating, while the flywheel and the
pressure plate rotate at the same speed
as the engine.
This means that the gearbox receives
no power from the engine, and the
gearbox input shaft stops rotating if
the gearbox is in the neutral position.
Clutch
CS43B-O
Disc linings with long
service life
The disc consists of a steel plate with
friction linings riveted to both sides.
The linings are made of heat-resistant
and asbestos-free material that can
withstand the high temperatures that
are generated when the disc slips during
starts.
Cushioning pads are located between
the linings and the steel plate, which
distribute pressure evenly over the
entire friction surface, resulting in a
long service life.
A damper, in the form of torsional
springs, is located around the centre of
the disc. Its purpose is to absorb any
jolts or vibrations. There is also a
smaller damper that eliminates idling
noise from the gearbox.
1
Smooth clutch action for
high driver efficiency
The clutch is operated with the help of
a compressed-air servo, to make gear
shifting easy for the driver.
The servo is run by a hydraulic system
where the master cylinder is located
near the clutch pedal in the cab. The
cylinder and fluid reservoir are accessible
through the service hatch at the
front of the truck. The function of the
servo in the system is to convert the
hydraulic pressure from the master
cylinder, with the help of compressed
air, into mechanical movement.
The compressed air-assisted hydraulics
means that low pressure on the
clutch pedal results in smooth engagement/disengagement
of the clutch. This
contributes to high driver efficiency.
3
4
5
6
Lamellen Disc engaged inkopplad
2
1
8
7
Lamellen Disc disengaged frikopplad