PWR TRNS POWER POINT

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TORQUE CONVERTER

• REDUCES THE AMOUNT OF MECHANICAL LINKAGE
• REDUCES ENGINE LUGGING
• PROVIDES A HYDRODYNAMIC DRIVE MECHANISM

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TRANSFER GEARS

• THE TRANSFER GEAR SET IS USED WHERE DESIGN
• REQUIRES POWER FLOW TO MOVE DIRECTLY BELOW
• THE ENGINE.
• THE CAT 621 SCRAPER AND THE M9 ACE ARE
• EXAMPLES.

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CAT 621B
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COMPONENTS
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DROP BOX TRANSMISSION
644E TRAM
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NO TRANSFER SET
D7G
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POWER SHIFT
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HYDRAULIC CLUTCH PACK

• CONSISTS OF
• AN ANCHOR
• THE CLUTCH APPLIED PISTON
• FRICTION DISC
• REACTIONARY PLATE

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HYDRAULICALLY APPLIED AND SPRING RELEASED
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PLANETARY GEAR SET

• USED IN THE POWER SHIFT TRANSMISSION TO ACHIEVE
  SPEED /TORQUE ADVANTAGE

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• WHEN THE CARRIER IS THE INPUT, OVERDRIVE
• RESULTS
• IF CARRIER IS THE OUTPUT, UNDERDRIVE RESULTS
• WHEN THE CARRIER IS HELD, WE HAVE REVERSE
• WHEN THERE ARE TWO HELD MEMBERS, THE RESULT
• IS DIRECT DRIVE. (11)
• WHEN THERE IS NO HELD MEMBER, THE RESULT IS
• NUETRAL.

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TRANSMISSION OPERATION
(CROSS SECTION)
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FORWARD AND FIRST
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FIRST SPEED REVERSE
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DROP BOX ARRANGEMENT
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TORQUE CONVERTER STALL TEST
THIS IS A SIMPLE TEST THAT CAN DETERMINE IF THE
ENGINE IS OUT OF ADJUSTMENT (TUNE-UP) OR THAT THE
TRANSMISSION IS AT FAULT.


THE TEST IS MADE WHILE THE OUTPUT SHAFT IS
BRAKED AND THE ENGINE IS RUNNING AT
FULL THROTTLE. YOU MUST CHECK THE TECH. MANUAL
FOR THE APPROPRIATE STALL SPEED.
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PROCEDURE
1. WITH THE TRANSMISSION WARMED, CONNECT AN
ACCURATE TACHOMETER TO THE ENGINE. 2. BLOCK
THE MACHINE SECURELY AND SHIFT TO THE DESIRED
RANGE. 3. ACCELERATE THE ENGINE TO FULL
THROTTLE. 4. AFTER REACHING A STABILIZED ENGINE
SPEED, RECORD THE ENGINE THE ENGINE SPEED. NOTE
BECAUSE OF RAPID HEATING OF THE OIL, NEVER HOLD
THE MACHINE STALLED FOR MORE THAN A FEW SECONDS
AT A TIME.
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RESULTS
IF THE ENGINE AND TRANSMISSION ARE FAILING, IT
WILL SHOW UP WHEN THE ACTUAL ENGINE SPEED IN THE
STALL TEST IS COMPARED TO THE NORMAL SPEED IN
THE TECHNICAL MANUAL.
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2 TYPES OF CLUTCH DISKS
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PROPELLER SHAFTS
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SOLID SHAFT
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TELESCOPING SHAFT
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STANDARD DIFFERENTIAL
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HEAVY DUTY DIFFERENTIAL
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HEAVY DUTY
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AUTOMATIC LOCKING (NO SPIN) DIFFERENTIAL
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AIR DIFFERENTIAL LOCK
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HYDRAULIC DIFFERENTIAL LOCK
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SINGLE REDUCTION
MC1150E/M9 ACE
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DOUBLE REDUCTION
CAT D7G
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