Engine

Engine power for the UT-R Series is a three cylinder, TK376/TK376U, a special clean and quiet diesel engine rated at 18.8 continuous horsepower (14.0 kW) at 2200 RPM, 18.9 continuous horsepower (14.1 kW) at 2250 RPM, and 19.6 continuous horsepower (14.6 kW) at 2425 RPM.

UT-R SPECTRUM
Model   TK376U
Fuel Type  

Diesel Fuel must conform to EN 590

No. 2 diesel fuel under normal conditions

No. 1 diesel fuel is acceptable cold weather fuel

Oil Capacity  

11.6 quarts (11.0 liters/litres) crankcase and oil filter

12.8 quarts (12.1 liters/litres) w/Bypass Oil Filter - Fill to full mark on dipstick

Oil Type  

API Classification CJ-4 or CK-4

ACEA Rating E6

Note API Classification FA-4 oils are not approved for use and should not be used.
Oil Viscosity  

14 F to 122 F (-10 C to 50 C): SAE 15W-40 (Synthetic)

5 to 104 F (-15 to 40 C): SAE 15W-40

5 to 104 F (-15 to 40 C): SAE 10W-30 (Synthetic or Synthetic Blend)

-13 to 104 F (-25 to 40 C): SAE 10W-40

-13 to 86 F (-25 to 30 C): SAE 10W-30

-22 to 122 F (-30 to 50 C): SAE 5W-40 (Synthetic)

Below -22 F (-30 C): SAE 0W-30 (Synthetic)

Engine RPM

UT-R SPECTRUM Low Speed Operation

UT-R SPECTRUM High Speed Operation

1500 ± 50 RPM

2150 ± 50 RPM

Engine Oil Pressure  

20 to 50 psig (138 to 345 kPa) in low speed

40 to 60 psig (276 to 414 kPa) in high speed

Intake Valve Clearance   0.006 to 0.010 in. (0.15 to 0.25 mm)
Exhaust Valve Clearance   0.006 to 0.010 in. (0.15 to 0.25 mm)
Valve Setting Temperature   70 F (21 C)
Fuel Injection Timing   16 ± 1 degrees BTDC
Fuel Injection Nozzle Opening Pressure   12.3 MPa + 0.98 MPa (1784 psig +142 psig) - 0
Low Oil Pressure Switch/Sensor   10 ± 2 psig (69 ± 14 kPa) - shutdown
High Coolant Temperature Sensor   220 ± 5 F (104 ± 3 C) - shutdown
Engine Thermostat   160 F (71 C)
Engine Coolant Type
    Notice
  • System Contamination
  • Do not add GREEN or BLUE-GREEN conventional coolant to cooling systems using RED Extended Life Coolant, except in an emergency. If conventional coolant is added to Extended Life Coolant, the coolant must be changed after 2 years instead of 5 years.

ELC (Extended Life Coolant), which is “RED”

Use a 50/50 concentration of any of the following equivalents:

Chevron Dex-Cool

Texaco ELC

Havoline Dex-Cool®

Havoline XLC for Europe

Shell Dexcool®

Shell Rotella

Saturn/General Motors Dex-Cool®

Caterpillar ELC

Detroit Diesel POWERCOOL® Plus

Coolant System Capacity   Check the coolant level in the overflow bottle. It should be above the Full Cold line. If necessary, add coolant to the overflow bottle.
Coolant Expansion Tank Cap Pressure   10 psig (69 kPa)
Note UT-R Series engine low speed setting, can dip too low when under load - if this occurs, please refer to Bulletin SB 944 for more details