| HYDRAULIC
TA TROUBLESHOOTING |
| PROBLEM
|
CAUSE
|
SOLUTION |
| 1. |
TA
COMES APART DURING SHIPPING OR INSTALLATION. |
A. |
A. HOSE CLAMP BROKEN OR LOOSE.
|
A. |
A.
CALL AG PARTS FOR REPLACEMENT TA. |
| 2. |
TA
IS TIGHT WHEN BOLTED IN. |
A. |
A. QUILL GEAR IS NOT ENGAGED IN ALL DISCS OF DD CLUTCH PACK.
|
A. |
ENGAGE QUILL GEAR IN ALL DISCS OF CLUTCH PACK. ALL TA'S PRODUCED
BY AG PARTS HAVE FOUR (4) DISCS IN DD CLUTCH PACK EXCEPT STANDARD
TA WHICH HAS THREE (3) DISCS IN DD CLUTCH PACK. |
| B. |
TA UNIT IS TOO LONG FOR TA HOUSING. |
B. |
CALL AG PARTS FOR REPLACEMENT TA. |
| 3. |
TA
REQUIRES SHIMS OF .100 OR MORE. |
A. |
A. TA HOUSING TOLERANCES NOT CONSISTENT.
|
A. |
A.
CALL AG PARTS FOR REPLACEMENT TA (NEVER SHIM TA OVER .100. 4TH
GEAR MAY NOT ENGAGE QUILL PROPERLY. |
| 4. |
GEAR
NOISE AFTER NEW TA INSTALLATION (LOUDER IN DD). |
A. |
LOWER SHAFT TOO TIGHT (DOESN'T ALLOW GEARS TO CENTER).
|
A. |
RUN
TRACTOR TO CENTER GEARS ON SHAFT. MAY REQUIRE 100 HRS OR MORE.
|
| B. |
POOR
CONSTANT MESH GEAR ALIGNMENT AFTER SHIMMING TA. |
B. |
SHIM
GEARS WITH 830410 SHIMS TO ACHIEVE PROPER ALIGNMENT OF CONSTANT
MESH GEARS. |
| C. |
WORN
DD GEARS. |
C. |
REPLACE
DD GEARS. |
| 5. |
LOWER GEAR HITS TA DRUM. |
A. |
PROBLEM WAS AMPLIFIED BY REMOVING TA ENDPLAY.
|
A. |
SHIM
GEARS ON LOWER SHAFT WITH 830410 SHIMS (IF LOWER GEAR STILL
HITS TA DRUM, CALL AG PARTS FOR REPLACEMENT LOWER GEAR.
|
| 6. |
FREEWHEELING
ON LOW SIDE OF TA. |
A. |
SELECTOR SPOOL NOT PROPERLY ADJUSTED.
|
A. |
ADJUST
SELECTOR SPOOL TO SPECIFICATION (YOU MUST OBTAIN 1 1/8"
UP TRAVEL FIRST. |
| B. |
86
SERIES SELECTOR SPOOL CABLE STRETCHED OR BROKEN. |
B. |
REPLACE WITH NEW CABLE AND ADJUST TO CORRECT SPECIFICATION (1
1/8" UP TRAVEL FIRST). |
| C. |
DUMP
VALVE IMPROPERLY ADJUSTED. |
C. |
ADJUST
DUMP VALVE TO CORRECT SPECIFICATION. |
| D. |
LOW
CLUTCH PRESSURE. |
D. |
INCREASE PRESSURE BY REPLACING REGULATOR SPRINGS. |
| E. |
TRACTOR
OVER BALLASTED. (FLUID IN TIRES, TOO MANY WEIGHTS ON TRACTOR. |
E. |
REMOVE
FLUID AND WEIGHTS FROM TRACTOR (IF TRACTOR STILL FREEWHEELS,
CALL AG PARTS FOR SUPER TA REPLACEMENT). |
| 7. |
ENGINE
LABORS IN NEUTRAL AFTER TA INSTALLATION OR AFTER NEW MCV GASKETS
INSTALLED. |
A. |
INCORRECT MCV GASKET OR GASKETS INSTALLED. |
A. |
REMOVE
MCV, CHECK GASKETS TO BE SURE GASKET FOR TRACTORS WITHOUT TA
WASN'T INSTALLED. |
| 8. |
MCV
GASKETS BLOWN. |
A. |
SEALING
COMPOUND ON GASKETS CAUSING HIGH SPOTS. |
A. |
SCRAPE
SEALING COMPOUND FROM GASKETS OR INSTALL GASKETS WITHOUT COMPOUND. |
| B. |
MCV NOT TORQUED PROPERLY. |
B. |
INSTALL MCV USING APPROXIMATELY 22 LBS TORQUE ON BOLTS. |
| C. |
MOUNTING
SURFACE, MCV PLATE OR PLATES NOT FLAT. |
C. |
CHECK
MOUNTING SURFACE AND MCV PLATE OR PLATES WITH STRAIGHT EDGE.
REPLACE OR GRIND FLAT. |
| 9. |
HYDRAULIC OIL LEAK IN CLUTCH HOUSING. |
A. |
IPTO SEAL DEFECTIVE. |
A. |
REPLACE IPTO SEAL. |
| B. |
IPTO
BEARING CARRIER WORN. |
B. |
REPLACE
IPTO BEARING CARRIER AND CHECK IPTO BEARING. |
| C. |
FRONT SEAL RING OF TA NOT SEALING. |
C. |
FIRST, TEST UNIT BY USING TA ON LOW SIDE. OIL WILL LEAK ONLY
ON DD OR HIGH SIDE. IF LEAK DISAPPEARS ON LOW SIDE, TA MUST
BE REPLACED. |
| D. |
SNAP
RING LEFT OFF IPTO HOUSING (IPTO WILL MOVE BACK AND FORTH). |
D. |
INSTALL
SNAP RING. |
| 10. |
TRACTOR
HESITATES OR STOPS WHEN SPRAGLESS TA IS SHIFTED. |
A. |
SLOW SHIFTING OF TA SHIFT LEVER BY OPERATOR.
|
A. |
SHIFT
TA LEVER RAPIDLY TO AVOID CENTER POSITION. ALSO MUST INSTALL
MODIFIED SELECTOR SPOOL. |
| B. |
WORN LINKAGE. |
B. |
REPLACE
LINKAGE. |
| 11. |
DOUBLE
SHIFT. |
A. |
INCORRECT DUMP VALVE SETTING. |
A. |
TA
CLUTCH PACKS SHOULD LOCK UP BEFORE ENGINE CLUTCH ENGAGES. CALL
AG PARTS SERVICE DEPARTMENT FOR HELP. |
| 12. |
CAVITATION
OF HYDRAULIC PUMP. |
A. |
SUCKING
AIR THROUGH FILTER HOUSING.
|
A. |
REPLACE
FILTER O-RING OR GASKET.
|
| B. |
SUCKING
AIR THROUGH SUCTION TUBE. O-RING LEFT OUT BETWEEN TA TUB AND
REAR CASTING. |
B. |
INSTALL
O-RING BETWEEN TA HOUSING AND REAR HOUSING. |
| C. |
TRACTORS
EQUIPPED WITH SUPERCHARGE LINE. |
C. |
REPLACE
SUPERCHARGE LINE WITH 830601 ELIMINATION KIT. |
| 13. |
SLIPS
OR STOPS ON LOW SIDE (TA) OF TA. |
A. |
SPRAG
CLUTCH FAILURE IN TA. |
A. |
REPLACE
TA. |
| 14. |
SLIPS
ON HIGH SIDE (DD) OF TA. |
A. |
SELECTOR
SPOOL NOT ADJUSTED PROPERLY. |
A. |
ADJUST
SELECTOR SPOOL.
SPECIFICATION. |
| B. |
LOW
OR LOSS OF CLUTCH PRESSURE. |
B. |
ADJUST
CLUTCH PRESSURE TO CORRECT |
| C. |
DUMP
VALVE STUCK OPEN OR MISADJUSTED |
C. |
CHECK
OR ADJUST. |
| D. |
CLUTCH
PACK WORN OUT. |
D. |
REPLACE
TA. |
| 15. |
SLIPPING
ON HIGH (DD) AND LOW SIDE (TA) OF TA. |
A. |
ENGINE
CLUTCH SLIPPING. |
A. |
REPLACE
ENGINE CLUTCH. |
| B. |
SPRAG
FAILURE PLUS HIGH SIDE (DD) CLUTCH PACK NOT FUNCTIONAL. |
B. |
CHECK
PRESSURES TO DETERMINE HYDRAULIC PROBLEM ON THE HIGH SIDE (DD).
REPLACE TA. |
| 16. |
LOW
CLUTCH PRESSURES (REST OF HYDRAULIC SYSTEM FUNCTIONAL). |
A. |
MCV TORQUED
TOO TIGHT, REGULATOR STICKS. |
A. |
RE-TORQUE
MCV TO CORRECT SPECIFICATION. |
| B. |
REGULATOR
SPRINGS WEAK. |
B. |
REPLACE
REGULATOR SPRINGS. |
| C. |
REGULATOR
SPOOL BINDING IN BORE. |
C. |
INSPECT SPOOLS AND BORE FOR GALLING. |
| 17. |
HIGH
CLUTCH PRESSURE. |
A. |
REGULATOR SPRINGS TOO STRONG.
|
A. |
REPLACE
REGULATOR SPRINGS WITH LIGHTER SPRINGS OR REDUCE PRESSURE BY
CUTTING APPROXIMATELY ONE COIL FOR EACH 10 LBS OF PRESSURE FROM
INNER REGULATOR SPRING.
|
| B. |
REGULATOR
SPOOLS BINDING IN BORE. |
B. |
INSPECT SPOOL AND BORE FOR GALLING. |
| 18. |
LOSS
OF PRESSURE AS OIL WARMS UP. |
A. |
PLUGGED FILTER.
|
A. |
CHECK
FILTER. |
| B. |
LOW
PUMP VOLUME. |
B. |
FLOW
RATE PUMP, REPLACE IF NOT TO CORRECT SPECIFICATION. |
| C. |
MCV
INTERNAL LEAK. |
C. |
REPLACE
MCV WITH WORKING MCV. |
| 19. |
LOSS
OF LUBE PRESSURE. |
A. |
A. FILTER PLUGGED.
|
A. |
A.
CHECK FILTER. |
| B. |
LUBE
REGULATOR STUCK. |
B. |
INSURE
REGULATOR WORKS FREELY. |
| C. |
EXCESSIVE
TA END PLAY. |
C. |
SHIM
TA TO SPECIFICATION OR REPLACE TA. |
| D. |
TA
LUBE BAFFLE BENT. |
D. |
REPLACE
TA. |
| E. |
SUMP
CHECK LEAKING. |
E. |
INSTALL
SUMP CHECK PLUG TO TEST FOR LEAKAGE. CORRECT PROBLEM. |
| F. |
DUMP
SPOOL STICKING OR OUT OF ADJUSTMENT. |
F. |
FREE
UP DUMP SPOOL, ADJUST TO CORRECT SPECIFICATION. |
| G. |
EXCESSIVE
WEAR ON TA SEAL RINGS. |
G. |
G.
REPLACE TA. |
| H. |
DEFECTIVE
TELL LIGHT SWITCH. |
H. |
REPLACE
SWITCH. |
| I. |
SUPERCHARGE
LINE SUCKING AIR. |
I. |
REPLACE
SUPERCHARGE LINE WITH 830601 ELIMINATION KIT |
| 20. |
LOSS
OF PRESSURE IN ALL POSITIONS (TA, DD & MIDDLE). |
A. |
FILTER PLUGGED.
|
A. |
CHECK
FILTER. |
| B. |
LOW PUMP VOLUME. |
B. |
FLOW
RATE PUMP (MUST BE TO SPECIFICATION). |
| C. |
BLOWN
MCV GASKET. |
C. |
REPLACE
MCV GASKET. |
| D. |
REGULATOR
VALVE STUCK. |
D. |
INSURE
VALVE IS FREE AND NOT BINDING BORE. |
| E. |
RELIEF
VALVE BLOWN. |
E. |
REPLACE
RELIEF VALVE O-RING OR RELIEF VALVE. |
| F. |
SUMP
CHECK LEAKING. |
F. |
INSTALL
SUMP CHECK PLUG TO TEST FOR LEAKAGE. CORRECT PROBLEM. |
| G. |
SUPERCHARGE
LINE SUCKING AIR. |
G. |
REPLACE
SUPERCHARGE LINE WITH 830601 ELIMINATION KIT. |
| 21. |
LOSS
OF CLUTCH PRESSURE ON LOW SIDE (TA) OF TA ONLY. |
A. |
BLOWN MCV GASKET. |
A. |
REPLACE
MCV GASKET. |
| B. |
BROKEN OR STUCK RING ON TA SHAFT. |
B. |
REPLACE
TA. |
| C. |
TA
CLUTCH PACKS MOVING BECAUSE OF BENT SNAP RING ON TA SHAFT. |
C. |
REPLACE
TA. |
| D. |
INTERNAL
LEAK ON LOW SIDE (TA) OF TA. |
D. |
REPLACE
TA. |
| 22. |
LOSS
OF CLUTCH PRESSURE ON HIGH SIDE (DD) OF TA ONLY. |
A. |
BLOWN
MCV GASKET. |
A. |
REPLACE
MCV GASKET. |
| B. |
BROKEN
OR STUCK RING ON TA SHAFT. |
B. |
REPLACE
TA. |
| C. |
TA
CLUTCH PACKS MOVING BECAUSE OF BENT SNAP RING ON TA SHAFT. |
C. |
REPLACE
TA. |
| D. |
iNTERNAL
LEAK ON HIGH SIDE (DD) OF TA. |
D. |
REPLACE
TA. |
| 23. |
TA
DOWN SHIFTS WHEN BRAKES AND OR STEERING IS USED.
|
A. |
A. PLUGGED FILTER.
|
A. |
A.
CHECK FILTER. |
| B. |
LOW
PUMP VOLUME. |
B. |
FLOW RATE PUMP, MUST BE TO CORRECT SPECIFICATIONS. |
| C. |
SUMP
CHECK LEAKING. |
C. |
INSTALL SUMP CHECK PLUG TO TEST FOR LEAKAGE. CORRECT PROBLEM. |
| D. |
LOW PRESSURE. |
D. |
PERFORM PRESSURE CHECKS. RAISE PRESSURES. |
| 24. |
HARD
STEERING, POOR BRAKES, SLOW SHIFT OF TA. |
A. |
A. PLUGGED
FILTER. |
A. |
A. CHECK
FILTER. |
| B. |
LOW
PUMP VOLUME. |
B. |
FLOW
RATE PUMP MUST BE TO CORRECT SPECIFICATION. |
| C. |
WRONG
STEERING ORIFICE INSTALLED. |
C. |
INSTALL
CORRECT ORIFICE. |
| D. |
DEFECTIVE
HAND PUMP. |
D. |
FLOW
RATE HAND PUMP MUST BE TO CORRECT SPECIFICATION. |
| E. |
FLOW
DIVIDER STUCK. |
E. |
FREE
FLOW DIVIDER AND MAKE SURE IT MOVES FREELY. |
| 25. |
LARGE
RISE IN TA CLUTCH PRESSURES (HIGH AND LOW SIDE) WHEN STEERING
WHEEL IS CRAMPED TO LEFT (NORMAL RISE IS 20-30 PSI). |
A. |
RELIEF
VALVE MALFUNCTION. |
A. |
REPLACE
RELIEF VALVE. |
| 26. |
OVERHEATING
OF BRAKES ON 86 SERIES TRACTORS (EARLY MODELS WITH OPEN CENTER
HYDRAULICS) 786, 886, 986, 1086, 1486. |
A. |
PLUGGED
OR RESTRICTED BRAKE LUBE ORIFICE. |
A. |
INSTALL
830601 SUPERCHARGE ELIMINATION KIT AND OVERSIZE BRAKE LUBE ORIFICES. |
| 27. |
NO
BRAKES WHEN TRACTOR IS FIRST STARTED. |
A. |
BRAKE
CHECK VALVE LEAKING. |
A. |
FOR
06, 26, 56, 66, 68 SERIES TRACTORS, REPLACE CHECK VALVE IN MCV.
FOR 86, 88 SERIES TRACTORS, REPLACE CHECK VALVE ON FIRE WALL. |
| 28. |
DIFFICULTY DISENGAGING RANGE TRANSMISSION.
|
A. |
DUMP
VALVE NOT ADJUSTED PROPERLY. |
A. |
RESET
DUMP VALVE. |
| B. |
TRANSMISSION
BRAKE OVER TIGHTENED. |
B. |
RESET
TRANSMISSION BRAKE. |
| C. |
IMPROPER
RELEASE OF ENGINE CLUTCH. |
C. |
INSURE
CLUTCH IS RELEASING COMPLETELY. |
| D. |
PILOT
BEARING STUCK OR DRIVING TA SHAFT. |
D. |
REPLACE
PILOT BEARING AND INSURE BEARING IS CENTERED ON JOURNAL. |
| E. |
WRONG
MCV GASKET INSTALLED. |
E. |
INSTALL CORRECT MCV GASKET. |
| F. |
TRACTOR
EQUIPPED WITH TENDERFOOT. |
F. |
CALL
AG PARTS, LTD. SERVICE DEPARTMENT FOR ADDITIONAL HELP. |
