Presentation is loading. Please wait.

Presentation is loading. Please wait.

1 Clutch Basics manual adjust / lube ZF Sachs Twin Extend operation & maintenance Western Region Art Herrnberger.

Similar presentations


Presentation on theme: "1 Clutch Basics manual adjust / lube ZF Sachs Twin Extend operation & maintenance Western Region Art Herrnberger."— Presentation transcript:

1 1 Clutch Basics manual adjust / lube ZF Sachs Twin Extend operation & maintenance Western Region Art Herrnberger

2 2

3 3 Manual adjust clutch

4 4 CLUTCH OPERATION BASICS Disconnects / Connects engine from / to transmission 99% of clutch wear occurs at vehicle start. (starting vehicle in low gear = max clutch life) Double clutching = disconnects mass of engine from trans while shifting gears.

5 5 Clutch Components

6 6 Clutch Brake Should be called the “Input Shaft” Brake

7 7 DISENGAGING AND

8 8 Diaphragm Spring generates Clamping Force of Clutch Retainer pushes on Levers, Lever ratio amplifies Diaphragm Force Diaphragm pushes on Retainer, Levers push on Pressure Plate

9 9 Release fork clearance Be sure the linkage / peddle full return

10 10

11 11 Release bearing to clutch brake clearance.530 inch - 9/16 th inch - ½ inch min

12 12

13 13 Is release fork to brg clearance less than 1/8 inch? CHECK FORK CLEARANCE AT EACH SERVICE, TAKE A TURN ON THE ADJUSTING RING…. MAINTAIN 1/8 INCH = MAX CLUTCH LIFE RECORD before & after adj measurements = MAX CLUTCH LIFE

14 14 WHAT IS CLUTCH ADJUSTMENT? Maintaining clamp force

15 15 Diaphragm Spring generates Clamping Force of Clutch Retainer pushes on Levers, Lever ratio amplifies Diaphragm Force Diaphragm pushes on Retainer, Levers push on Pressure Plate

16 16 Diaphragm Force (Compression) Controlled By Position of Retainer (Contact point of Diaphragm on Cover Housing is a fixed position)

17 17 Retainer Position is Controlled by Adjusting Ring Retainer is positioned by Lever Lever orientation is a consequence of: Disc + IP/PP thickness (uncontrollable) Adjusting Ring setting (controllable) Indirectly, Adjusting Ring setting Controls Diaphragm Force

18 18 (0.530”) (1/8”) Freeplay How to Properly Control Diaphragm Force, When You Can’t See inside the Clutch to Position Retainer? Sleeve Length is Known, Therefore Release Bearing Clearance to Clutch Brake and Freeplay is Used to Detect Retainer Position Freeplay Loss Indicates Retainer Position is Changing (Eventually Requiring Clutch Adjustment)

19 19 Diaphragm Spring Characteristic Force Free StateDeflection Dual Trace Caused By Friction (Hysteresis) Compression Stroke Return Stroke Diaphragm Force in Frictionless System

20 20 Clutch Characteristic – Clamp Load Curve Clamp Load Amount of Wear Which Causes Free Play to Become Zero Free Play = ZeroBearing at.530” Required Clamp Load Loss of Free-play Indicates Adjustment is Required Set Point Prior to Adjustment Set Point at Initial Installation Free state Clutch bolted to the flywheel.530 clearance bearing to clutch brake

21 21 Clutch adjustment is turning the adj ring to move the pressure plate forward to compensate for friction disc wear (Measured by position of release bearing) The following are also methods of adjusting a clutch Clutch adjustment is turning the adjusting ring

22 22 Clutch brake clearance factors Clutch brake wear Transmission bearing retainer wear

23 23 What is condition?

24 24

25 25 Trans input bearing retainer

26 26 Release Fork Does it pull straight back on Release bearing? Wear patterns tell a story Bushings Shafts Conditions Anti rotation surfaces. Hardened forked needed?

27 27 Lube interval = 15,000 miles CHASSIS GREASE IN A RELEASE BEARING? Chassis grease will not stay put at high temp

28 28 CLEAN OLD GREASE FROM ZERK.

29 29 Cross shafts & linkage

30 30 Block or “Cage” clutch at removal (3 inch ½ inch thick blocks at removal….keeps levers loaded) Pressure Plate

31 31 Clutch basics Summary Maintain 1/8 fork clearance = max life Clutch brake squeeze is 1/2 inch - 9/16 th inch Make a clutch internal clutch adjustment at each service Use proper lube Do not lube the clutch brake friction surface Block / or “cage” clutch at removal

32 32 TWIN EXTEND clutch 15 ½ inch two plate Controlled center plate Self adjusting Locking adjusting mechanism Open architecture clears the mechanism of dirt

33 33 3.Key Features Open architecture “free flow” design – adjustment mechanism is not confined to a narrowly clearanced packaging space. If / when dirt ingestion occurs, build–up remains in areas that do not reach adjustment mechanism

34 34 3.Key Features Patented “Controlled Center Plate” mechanism ensures full release of Both Disc Assemblies XTend locking mechanism prevents misadjustment due to system vibrations or shock loads

35 35 Shipping (caging ) bolts Four 7/16 X 1.5 inch bolts

36 36 Initial check. Set up. 1) VIDEO 2) PDF file

37 37 Twin Extend Self adjusting. Routine adjustment not needed Not maintenance free, check the system at PM Normal lube interval Cage bolts must be in place to install / remove A punch and a hammer will not torque the spanner nuts

38 38 ZF Sachs Twin Extend clutch basics manual adjust / lube Western Region Art Herrnberger Questions? Thank you


Download ppt "1 Clutch Basics manual adjust / lube ZF Sachs Twin Extend operation & maintenance Western Region Art Herrnberger."

Similar presentations


Ads by Google