Auto Specialties recommends that these pulleys be installed by a qualified mechanic.

PRE-INSTALLATION CHECK LIST:

1. INSURE RADIATOR DOES NOT HAVE AN OVER ABUNDANCE OF SOLIDFICATION OR SLUDGE. (DRAIN RADIATOR SUFFICIENTLY TO VIEW COOLANT TUBES.) CLEAN IF REQUIRED. CHECK FOR BENT OR BLOCKED EVAPORATOR FINS.

2. REPLACE THERMOSTAT IF MORE THAN 3 YEARS OLD.

3. TEST FAN DRIVE CLUTCH: SPIN THE FAN BLADE. A MODERATE RESISTANCE SHOULD BE FELT. IF THERE IS NO RESISTANCE OR A VERY HIGH RESISTANCE, THE MINIMUM AND MAXIMUM FAN SPEEDS MUST BE CHECKED PER FACTORY SPECIFICATIONS.

INSTRUCTIONS FOR THE THREE PULLEY SYSTEM:
1. LOOSEN ALTERNATOR NUT, WATER PUMP AND CRANK PULLEY BOLTS WHILE BELT IS STILL IN TENSION. NOTE: AN IMPACT SWIVEL IS REQUIRED TO REMOVE ALT. NUT.

2. REMOVE BELT.

3. BOLTS AND THREE FACTORY PULLEYS CAN NOW BE EASILY REMOVED. PLACE FAN CLUTCH CAREFULLY AGAINST RADIATOR WHILE REMOVING WATER PUMP PULLEY.

4. INSTALL NEW PULLEYS WITH BOLTS, HAND TIGHT AT THIS POINT. (SOCKET HEAD BOLTS ARE SUPPLIED FOR CRANK PULLEY.) INSTALL BELT. TORQUE ALL BOLTS PER FACTORY SPECS. (USE OF LOCTITE THREAD LOCK IS RECOMMENDED ON ALL THREADS.)

5. CHECK THAT BELT IS PROPERLY SEATED IN ALL PULLEYS. INSURE TENSIONER ARROW IS WITHIN THE INDICATOR MARKS ON TENSIONER. IF ADJUSTMENT IS REQUIRED, RELAX TENSIONER FROM BELT, LOOSEN UPPER 9/16 HEX ALTERNATOR ANCHOR BOLT, SHIFT ALT. TOWARDS AIR CLEANER OR ALLOW IT TO MOVE IN AS REQUIRED WITHIN THE CLEARANCE OF THE DIAMETERS. TIGHTEN WHILE HOLDING ALTERNATOR. IF ADDITIONAL ADJUSTMENT IS REQUIRED, REMOVE BELT, LOOSEN 3/4" HEX NUT ON TENSIONER. PUSH DOWN ON TENSIONER PULLEY TO SHORTEN MOVEMENT, PULL UP TO LENGHTEN. TIGHTEN 3/4" NUT WHILE HOLDING TENSIONER PULLEY. IF NEW BELT IS DESIRED, INSTALL GATES BELT K060900 FOR 85-93 5.0 MUSTANG WITH A/C.

6. SET WARM IDLE SPEED FOR AUTOMATIC CARS AT 650-700 RPM IN DRIVE. STANDARD SHIFT AT 750-800 RPM.

INSTRUCTIONS FOR CRANK & WATER PUMP PULLEYS ONLY: FOLLOW ABOVE INSTRUCTIONS, EXCEPT THE REMOVAL OF ALTERNATOR PULLEY IS NOT REQUIRED. INSTALL GATES BELT K060895. FOR TRUCK APPLICATIONS SEE BELT NUMBERS LISTED BELOW.

INSTRUCTIONS FOR CRANK & ALTERNATOR ONLY:
(RECOMMENDED FOR 85 & 86 5.0 MUSTANG W/STANDARD TRANSMISSION) FOLLOW INSTRUCTIONS FOR INSTALLING 3 PULLEY SYSTEM, EXCEPT THE REMOVAL OF THE WATER PUMP PULLEY IS NOT REQUIRED. INSTALL GATES BELT K060900.

GENERAL RECOMMENDATIONS:
1. WITH PART NO. 820126 & 520126, A REDUCTION IN CHARGING AT THE LOWER RPM'S IS NORMAL. IT IS BEST TO DRIVE IN A GEAR SUFFICIENT TO MAINTAIN APPROXIMATELY 1500 RPM'S OR GREATER IN ORDER TO MAINTAIN A GOOD CHARGE IN THE BATTERY.

2. AVOID PROLONGED IDLE ESPECIALLY IN HOT WEATHER OR WITH AC OR HEADLIGHTS IN USE.

TRUCK BELT LENGTH:
87 5.0 : GATES K060875
88-92 5.0 : GATES K060885
93-96 5.0 : GATES K060970
88-92 5.0 : GATES K060915
93-97 5.8 : GATES K061000