Highway Class Paver/Finishers
Drive Train
A-6
PF-510
The highway class paver/finisher is powered by either a
Cummins or a John Deere 6-cylinder diesel engine (1)*.
Power is delivered through a PTO clutch (2)* and short
coupled drive shaft (3)* to a pump drive box (4).
Traction drive power is hydrostatically transmitted from
the variable displacement L.H. and R.H. traction drive
pumps (5)* to the L.H. and R.H. traction drive motors
(6)*. All PF-510's have independent L.H. and R.H.
(MDC) mechanical displacement control of respective
traction drive pumps through linkage from the operator's
consoles. These motors are each mounted on electric/
hydraulic shifted 3-speed transmissions (7)* for speed
reduction and selection. From the transmissions,
mechanical power is transferred by universal joints (8)*
to a reduction transmission drop box (9) on each side of
the machine. A track drive sprocket on the output shaft
of each drop box drives the track (10).
The track systems are kept properly tensioned auto-
matically by track tension cylinders (11)* forcing the
front take-up wheel assemblies (12) forward. The
general purpose pump (13)* provides 1800 psi pressure
through a manifold and check valve assembly to the
track tension cylinders on each side of the machine.
This pressure keeps the cylinder extended and the
track systems tight by pushing the front take-up wheel
forward whenever the engine is running. Cylinder
pressure is maintained by the check valve when the
engine is off. During operation, if slack is required in
either track when going over large obstructions or
passing solid materials through the drive sprocket and
bogies, the track tension cylinder retracts. As pressure
on the cylinder increases from an obstruction, a hydrau-
lic relief valve will bypass hydraulic pressure to the
cylinder at 3500 psi (24,129 kpa, 241 bar). When the
obstruction has cleared, the relief valve will reset,
retensioning the track.
Auger/conveyor drive power is hydrostatically trans-
mitted from the electrically controlled, variable displace-
ment, L.H. and R.H. auger/conveyor drive pumps (14)*
to independent L.H. and R.H. auger/conveyor drive
motors (15)*. Mechanical power from the L.H. and R.H.
auger/conveyor motors planetaries is independently
transferred through the auger/conveyor drive chain
case (16) to the respective conveyors (17) and augers
(18).
* Specific model numbers of vendor supplied compo-
nents for various series of machines are covered in
the vendors list in the appendix.
15
16
BK-16
15
9
10
9
13
10
12
11
17
6
7
8
18
1
2
3
4
18
8
7
6
5
14
14
1.
2.
3.
4.
5.
6.
7.
8.
9.
Engine
PTO Clutch
Drive Shaft
Pump Drive Box
Traction Drive Pump
Traction Drive Motor
3-Speed Transmission
Drive Shaft
Reduction Transmission Drop Box
10.
11.
12.
13.
14.
15.
16.
17.
18.
Drive Track
Track Tension Cylinder
Front Tack-Up Wheel
General Purpose Pump
Auger/Conveyor Pumps
Auger/Conveyor Drive Motors
Auger/Conveyor Chain Case
Conveyors
Augers
5
