Tennant 255 Series II, Operator'S Manual, Page: 19 / 128

SPECIFICATIONS
1-3
255 SERIES II MM189 (12---89)
MACHINE SPECIFICATIONS
POWER TYPE
Engine for machines below serial number 038000.
Type --- piston
Ignition --- breakerless---type spark
Cycle --- 4
Aspiration --- natural
Cylinders --- 4
Bore --- 2.91 in (74 mm)
Stroke --- 2.56 in (65 mm)
Displacement --- 67 cu in (1100 cc)
Net power --- 25 hp (18.6 kw) @ 2200 rpm,
governed
Net power --- 31 hp (23.1 kw) @ 2650 rpm,
governed
Net power --- 44.6 hp (32.3 kw) @ 3600 rpm,
maximum
Fuel --- gasoline, 87 octane minimum, unleaded or
LPG
Cooling system --- water/ethylene glycol antifreeze
Electrical system --- 12 V nominal, 37 A alternator
Engine for machines serial number 038000 and
above.
Type --- piston
Ignition --- breakerless---type spark
Cycle --- 4
Aspiration --- natural
Cylinders --- 4
Bore --- 2.70 in (69 mm)
Stroke --- 2.97 in (76 mm)
Displacement --- 67 cu in (1100 cc)
Net power --- 25 hp (18.6 kw) @ 2200 rpm,
governed
Net power --- 31 hp (23.1 kw) @ 2650 rpm,
governed
Net power --- 44.6 hp (32.3 kw) @ 3600 rpm,
maximum
Fuel --- gasoline, 87 octane minimum, unleaded or
LPG
Cooling system --- water/ethylene glycol antifreeze
Electrical system --- 12 V nominal, 37 A alternator
POWER TRAIN
Propelling --- hydraulic drive motor, rear wheel
Main brush --- hydraulic drive motor
Side brush --- hydraulic drive motor
Vacuum fan --- hydraulic drive motor
STEERING
Type --- rear wheel controlled, automotive worm and
sector gear
Power source --- manual
HYDRAULIC SYSTEM
Function --- operates propelling, hopper lift, hopper
dump, main brush drive, side brush drive, and
vacuum fan drive.
Control valve, low dump model, side brush drive,
hopper lift --- open center type, single spool.
Control valve, multi---level dump model, side brush
drive, hopper lift, hopper dump --- open center
type, two spool.
Control valve, vacuum fan drive, main brush drive ---
open center type, single spool, solenoid
operated.
Pump, propelling --- variable displacement piston
type, 1.24 cu in (20 cc) maximum displacement
per revolution,
11.8 gpm (45 L/min) @ 2200 rpm,
14.2 gpm (54 L/min) @ 2650 rpm
Propelling system relief pressure --- 2750 psi
(18,960 kPa)
Pump, accessories --- gear type,
1.02 cu in (14 cc) displacement,
9.5 gpm (36 L/min) @ 2200 rpm,
12.3 gpm (47 L/min) @ 2650 rpm.
Side brush and lift cylinder system relief
pressure --- 1900 psi (13,100 kPa)
Vacuum fan and main brush motor system relief
pressure --- 2150 psi (14,825 kPa)
Motor, propelling --- internal gear type,
18.6 cu in (305 cc) displacement per revolution,
4500 psi (31,030 kPa) maximum rated
pressure.
Motor, main brush --- internal gear type,
4.5 cu in (75 cc) displacement per revolution,
2500 psi (17,240 kPa) maximum rated pressure
Motor, side brush --- internal gear type,
2.8 cu in (45 cc) displacement per revolution,
1500 psi (10,340 kPa) maximum rated pressure
Motor, vacuum fan --- external gear type,
0.26 cu in (5 cc) displacement per revolution,
3000 psi (20,685 kPa) maximum rated
pressure