1988 Ram Raider 81-370-8019: Page 24-32

PERFORMANCE TEST

(1) Park the test vehicle away from the direct rays of the sun.
(2) Connect a tachometer and manifold gauge set.
(3) Set the on-vehicle air conditioner controls to the maximum cooling position as follows:

Air conditioning switch : A/C-ON position
Mode selection lever: Face position
Temperature control lever: Max. cooling position
Air selection lever: Recirculation position
Blower switch: HI (fast) position

(4) Start engine and adjust rpm to 1,000 with air conditioner clutch engaged.
(5) Engine should be warmed up with doors, windows closed and the hood open.
(6) Insert a thermometer in the left center air conditioner outlet and operate the engine for 20 minutes.
(7) Note the discharge air temperature.

NOTE If the clutch cycles, take the reading before the clutch disengages.


Performance Temperature Chart

Garage ambient tem- 21 (70) 26.7 (80) 32.2 (90) 37.8 (100) 43.3 (110)
perature ~C (~F)

Discharge air tem- 2 - 5 2 - 5 2 - 5 2 - 5 2 - 5
perature ~C (~F) (35 - 41) (35 - 41) (35 - 41) (35 - 41) (35 - 41)

Compressor discharge 621 - 834 703 - 979 841 - 1138 993 - 1345 1131 - 1517
pressure kPa (psi) (90 - 121) 102 - 142) (122 - 165) (144 - 195) (164 - 220)

Compressor suction 124 - 207 130 - 221 138 - 241 145 - 255 152 - 276
pressure kPa (psi) (18 - 30) (19 - 32) (20 - 35) (21 - 37) (22 - 40)


Revised TSB 24-03-88 December 5, 1988