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Using Vacuum Pump

  1. Disconnect vacuum line from diaphragm unit and attach vacuum pump. See Figure. Apply parking and service brakes. Start engine and apply 15 in. Hg of vacuum to diaphragm unit. Read and record control pressures in all selector positions.
  2. Bring engine RPM to 1000. Reduce vacuum to 10 in. Hg. Read and record control pressures in "OD", "D", "2" and "1" selector positions.
  3. Reduce vacuum to one in. Hg. Read and record control pressures in "OD", "D", "2", "1" and "R" selector positions. See appropriate CONTROL PRESSURE SPECIFICATIONS table and CONTROL PRESSURE TEST RESULTS .
CONTROL PRESSURE SPECIFICATIONS (PSI @ SEA LEVEL)

Drive Range 15 in. Hg & Above 10 in. Hg WOT Stall Thru Detent
OD, D,2,1 57-78 114-134 205-235
R 67-105 157-177 282-316
P, N 57-78 - -
CONTROL PRESSURE SPECIFICATIONS (PSI @ 5000 FT.)

Drive Range 15 in. Hg & Above 10 in. Hg WOT Stall Thru Detent
OD, D,2,1 57-67 90-110 180-210
R 67-77 124-144 247-280
P, N 57-67 - -
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