Harsco MARK IV - Engine; Drive Train; Brake System

MARK IV HD J2 TAMPER SAFETY / GENERAL PAGE 1 - 17
BULLETIN 5082505 INFORMATION REVISED 10 - 2020
1
1.8 Specifications
1.8.4 Engine
Cummins Model QSB 6.7 Tier IV. . . . . . . . . . . 6 cylinder water cooled turbo charged diesel
see engine manual for detailed information
Horse Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 HP (186.4 kw) @ 2,200 RPM
RPM - Idle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .800 - 900 RPM
RPM - Full. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,200 RPM
Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24V - 175 Amp
Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diesel Exhaust Fluid (DEF) tank
engine shutdown system, engine enclosure
engine neutral start / propel interlock
1.8.5 Drive Train
Pump Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . two position pump drive
with two variable displacement piston hydraulic pumps
and two fixed displacement double gear hydraulic pumps
Drive Train - Front / Rear . . . . . . . . . . . . . . . . . . hydraulic two-speed gear box on each axle
direct-driven by proportionally variable
displacement drive motor providing full-time
4 wheel drive with automatic speed control
foot operated control pedal
Axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3/8 in (187.3 mm)
Bearings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . heavy duty roller bearings
Wheels - AAR Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 in (711.2 mm)
cast steel, insulated or non-insulated
1.8.6 Brake System
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . four wheel tread type
adjustable composition brake shoes
Service Brakes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . air-applied / spring-released
hand operated control valve
Parking Brakes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . spring-applied / air-released
hand operated control valve