Cooler Requirements

Heavy Duty UltraShift/AutoShift Gen 3 Cooler Requirements

• Transmissions must not be operated at temperatures above 250°F [121°C]. Operation at temperatures above 250°F [121°C] causes loaded gear tooth temperatures to exceed 350°F [177°C] which will ultimately destroy the heat treatment of the gears. If the elevated temperature is associated with an unusual operating condition that will recur, a cooler should be added, or the capacity of the existing cooling system increased. • The following conditions in any combination can cause operating temperatures of over 250°F (120°C):[see page 20]. • Operating consistently at high loads/slow speeds • High ambient temperatures • Restricted air flow around the transmission • Exhaust system too close to the transmission • High horsepower operation • Engine Retarders

External oil coolers are available to reduce operating temperatures when the above conditions are encountered. Eaton

Oil cooler systems must meet a minimum requirement of 3/4 I.D. cooler lines and 8 GPM. system flow @ 1500 RPM.

The end user is ultimately responsible for maintaining transmission lube temperatures below 250°F [121°C].

Transmission Oil Coolers are recommended Transmission Oil Coolers are required

With engines of 350 H.P. and above With engines 400 H.P. and above and GCW’s of 90,000 lbs [40,823 kg] or greater With engines 400 H.P. and above and 1400 lbs. ft. [1898 N•m] or Greater torque With engines 450 H.P. and above With engines 1500 lbs. ft. [2033 N•m] and above

UltraShift AW3 Cooler Requirements

1. A clutch cooler must be used with the Eaton UltraShift AW3 transmission. The cooler sizing must meet the requirements specified in this document. 2. The maximum pressure drop through the transmission cooler is 10 PSI @ 8 GPM of oil flow (at normal operating temperatures). 3. Coolers must be sized according to the following requirements and be able to provide minimum heat extraction rates with the vehicle stationary, engine idling at normal operating temperature, and oil flow at 6 gallons per minute. • GCW less 33,000 -- 450 BTU/Min. • GCW greater 33,000 --700 BTU/Min. • Severe service and GCW greater than 43,000 -- 1000 BTU/Min. Applications include refuse, tankers, construction equipment such as dump trucks, concrete mixers, and off road equipment. 4. Transmission cooler must withstand operating pressure up to 300 PSI. 5. The cooler and cooler connecting lines should be free of debris, dirt, grease, etc. before being attached to the transmission. If these conditions exist, cooler lines must be flushed or cleaned. 6. The cooler must meet Eaton application guidelines and requirements in this document unless specifically approved by

Eaton. 7. A minimum of SAE # 12 (3/4 inch) cooler hose or comparable tubing must be used for the Eaton UltraShift AW3 transmission cooler circuit. 8. Cooler connecting lines should be routed in such a way as to prevent kinks or leaks from rubbing on other components.

Use high temperature protection as required to protect against heat deterioration.

Oil To Water Cooler Requirements AW3

Transmission Cooling System Without Remote Bypass

R A D I A T O R

TO WATER PUMP

WATER TO COOLER

OIL COOLER - MINIMUM #12 RECOMMENDED OIL COOLER

OIL FROM COOLER TO TRANSMISSION

OIL COOLER LINERS and HEADS THERMOSTAT

PUMP T C COOLER

WC OUT TO OIL COOLER 1-1/16 - 12 UN-2B FOR SAE-12 O-RING FITTING, 37 DEGREE FLARED FITTING (OEM SUPPLIED)

WC IN FROM OIL COOLER 1-1/16 - 12 UN-2B FOR SAE-12 O-RING FITTING, 37 DEGREE FLARED FITTING (OEM SUPPLIED)

RADIATOR