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HEAVY DUTY OIL COOLERS
Technical Guide
COOLERS
Allison Transmission Application Guide
HIGHWAY (1) OFF-HIGHWAY
TRANSMISSION MODEL GPM FLOW HORSEPOWER
ADD-ON
COOLER PART #
REPLACEMENT
COOLER PART #
ADD-ON
COOLER PART #
REPLACEMENT
COOLER PART #
AT 540, 542, 545 4.5 125 1268 1299 1299 1271
150 1260 1299 1299 1271
175–235 1299 1299 1299 1271
MT 40, 41, 42 SERIES 8.0 150 1260 1290 1290 1292
200 1290 1290 1292 2305
250 1290 1292 2305 2306
MT 643, 645, 653 8.0 175–200 1299 1299 1299 1271
250 1299 1271 1271 2306
MT 644, 646, 647, 648, 654 12.0 200 1290 1290 1290 2305
MT 645CR, 655, 656CR 250 1292 1292 1292 2305
300 1290 2305 2305 1297
HT 740, 747, 748, 750 15.0 250 1290 1292 1292 2306
HT 7500DR, 754, 755CR 300 1290 2305 2305 1297
HT 755DR, CBLT 754 350 1292 2306 2306 1298
400 1292 1297 1297 1298
425 2305 1298 1298 2312
V 730, 731 20.0 200 1290 1292 – –
(1) Highway vehicles refers to vehicles usually operated above 30mph. Use off-highway applications for refuse trucks.
Rapid-Cool® Heavy-Duty
Hayden’s 37mm heavy duty plate & fin coolers are ideal for Transmission
and Engine oil cooling applications requiring higher flow range and
increased heat transfer capacity in a compact space.
FEATURES
PRE-DRILLED MOUNTING BRACKETS FOR EASY INSTALLATION
3 SIZES AVAILABLE TO HANDLE A WIDE RANGE OF APPLICATIONS
PATENTED INTERNAL TURBULATION FOR INCREASED HEAT TRANSFER &
MINIMAL PRESSURE DROP (Patent No. 6,478,080)
37° JIC MALE FLARE (-12) FITTINGS FOR MAXIMUM FLOW CAPACITY
Rapid-Cool® Heavy-Duty Specication Chart
PART # THICKNESS HEIGHT LENGTH CORE FITTING TYPE
RECOMMENDED
FLOW RANGE
COOLING
BTU / HR (1)
776 1.7” 4.3” 12.9” 11.2” FEMALE 7/8-14 O-RING X 37° JIC MALE FLARE (-12 AN) 1-5 GPM 5,200 – 10,400
777 1.7” 6.6” 12.9” 11.2” FEMALE 7/8-14 O-RING X 37° JIC MALE FLARE (-12 AN) 1-5 GPM 7,900 – 18,500
778 1.7” 9” 12.9” 11.2” FEMALE 7/8-14 O-RING X 37° JIC MALE FLARE (-12 AN) 1-5 GPM 9,600 – 20,800
(1) @ 100° F oil to air differential temperature.