-40%
SBC RAM HYDRAULIC THROWOUT BEARING,ROUND,CHEVY,48100
$ 137.27
- Description
- Size Guide
Description
You are bidding on a Brand New Ram Small Block Chevy Hydraulic Release Bearing with a Round Bearing Face (Part #RAM 48100).Round bearing face is for use with any mini-clutch, such as a Ram, Quartermaster, Tilton, Mcleod, etc.
For use with any transmission with a 4.675" O.D. register on the bearing retainer and a 1.375" or less O.D. on the bearing retainer collar.
Threaded adjustable design eliminates the need for shims
Design will also eliminate the "blow-apart" possibility that is common with other hydraulic bearings
Lightweight aluminum housing
Hardcoated piston & cylinder
Mounts either using the clutch ball hole and a mounting bracket (which is provided) or by using 2 pre-drilled holes in the bearing to mount it to the bellhousing, which you would have to drill the 2 holes in
Comes with instructions and necessary hardware, including a bleeder line
Preparation:
Proper installation of the Ram hydraulic bearing is critical to the operation of both the bearing and your clutch. Please take your time, double check all measurements and centereing of the bearing during mounting. Off center mounting will result in bearing leakage and improper operation of the clutch
Before installing the bearing, you must decide which mounting method you with to use. The bearing may be mounted by drilling two holes in the bellhousing and using the provided countersunk screws or it may be mounted using the provided clamp assembly through the pivot hole (CLAMP COMES WITH THE CHEVROLET ONLY)
A proper hydraulic master cylinder must be selected to actuate the hydraulic bearing. For most clutches, a 3/4" or 7/8" bore cylinder will provide adequate fluid movement to release the clutch
Setting up the bearing in the bellhousing:
Before mounting your bearing, the bellhousing must be checked for proper alignment to the engine block
Bellhousing alignment is critical to the operation of your clutch and hydraulic bearing. A misalignment bellhousing will cause erratic clutch operation, and premature wear or fluid leakage on the hydraulic bearing assembly.
To check alignment, use a dial indicator with the base mounted to the crank flange to check the transmission pilot hole for concentricity to the crankshaft centerline with +/-.010". Check the face of the bellhouing (where the transmission mounts) for squareness to the back of teh block. Variance should be no more than +/-.010" side-to-side and top-to-bottom
Mounting Instructions with the provided clamp:
Remove the transmission bearing retainer from the front of your transmission
Remove the pivot ball assembly from your bellhousing
Place the bellhousing over the removed bearing retainer on a flat surface so that the collar protrudes to the inside of the bellhousing and the open side of the housing faces up
Put the bearing assembly over the retainer and locate against the rear of the bellhousing so that the flat side of the base lines up with the pivot ball hole
In some cases, it may be necessary to machine some of the pivot ball mounting boss in order for the bearing base to sit flat against the rear of the bellhousing
Because you have not yet modified the retainer collar, the bearing may still not sit flat in the bellhousing. From the rear of the bearing, push the piston out so that the bearing is in the extended position. Now the assembly should sit flat against the rear of the bellhousing
Line up the mounting clamp (with the curved side down) to the pivot ball hole and install a bolt. Use a thread retaining compound to insure the bolt won't back out
Mounting Instructions using the predrilled holes in the bearing base:
Remove the transmission bearing retainer from the front of your transmission
Remove the pivot ball assembly from your bellhousing
Place the bellhousing over the removed bearing retainer on a flat surface so that the collar protrudes to the inside of the bellhousing and the open side of the housing faces up
Put the bearing assembly over the retainer and locate against the rear of the bellhousing so that the flat side of the base lines up with the pivot ball hole
If the bearing assembly doesn't sit flat over the retainer collar, it may be necessary to machine some of the pivot ball mounting boss in order for the bearing base
Because you have not yet modified the retainer collar, the bearing may still not sit flat in the bellhousing. From the rear of the bearing, push the piston out so that the bearing is in the extended position. Now the assembly should sit flat against the rear of the bellhousing
Now, mark the 2 holes to be drilled using the base as a template. Drill the holes 1/4" and counterbore the transmission side of the bellhousing so the the provided 1/4"-20 countersunk bolts sit at or just below the bellhousing face
Bolt the bearing assembly to the inside of the bellhousing
Setting up and modifying the bearing retainer:
It will be necessary to modify the transmission bearing retainer to allow the bearing full travel and to allow the transmission to up properly to the bellhousing
Turn the bellhousing over so that the transmission side is facing up
Make sure that the bearing is pushed all the way back in the cylinder. Place the bearing retainer collar into the bearing and bellhousing
The collar won't go all the way in; you must now determine how much and remove material from the collar so that will fit all the way into the transmission guide hole in the bellhousing. Make sure the collar doesn't push the bearing piston up as you push the collar in, as this won't allow the bearing to return far enough to attain proper bearing-to-clutch finger clearance or adequate travel to release the clutch
Once the retainer collar is fit, countersink the 4 mounting holes for use with the provided countersunk capscrews. At this point, re-install the collar to the transmission and bolt it up to the bellhousing. The transmission should bolt up flush to the housing without pushing the bearing piston outward
Initial Hook Up and Adjustment:
Install the two 90 degree #3 fittings into the cylinder using a thread sealant. Make sure both fittings point in the same direction and are parallel to the bottom of the bellhousing
Screw the bearing into the base so that 1 or 2 threads remain before the cylinder bottoms out on the threads
Orient the cylinder so that the 90 degree fittings face the clutch fork opening and tighten the set screw on the base of the assembly against the milled flat spot on the cylinder
Install the bleed line onto the top fitting and the line from the hydraulic master cylinder (not included) to the other fitting. Route the lines through the clutch fork hole on the bellhousing. Install the bleeder screw to the end of the bleed line and bleed the system
The bearing piston should move to the top of the cylinder when the pedal is depressed. You can verify that the bearing is making full travel by looking from the backside of the bearing/bellhousing (with transmission removed) to make sure the rear snap ring is moving all the way to the o-ring boss. Be sure to push the bearing all the way back in the cylinder after checking
Final Assembly and Adjustment:
At this point, the simplest way to set up the adjustment is by using an engine block and crank out of the vehicle, however, it may be done with the engine in the car if these parts are not available to you
Install the clutch assembly to the crank as directed
Again, make sure the bearing is pushed all the way back in the cylinder
Bolt the bellhousing to the block using 3 or 4 bolts. As you tighten the bellhousing bolts, be sure that the bearing is not releasing the clutch by watching through the clutch fork hole
Before actuating the clutch pedal, take a measurement from the snap ring on the rear of the piston to the stop ridge (o-ring boss) on the cylinder to determine release travel and air gap
Place an alignment shaft through the disc(s) and actuate the clutch pedal. Measure the release gap of the clutch between the plate(s) and disc(s)
Now allow the pedal to return and re-measure the distance from the snap ring to the stop ridge. The difference between the two measurements is the "air gap" of the bearing, or the clearance between the bearing and the clutch fingers. This measurement also indicates how much closer the bearing can be adjusted without riding on the fingers during operation
If the proper release gap is not attained, you must remove the bellhousing, disconnect the hydraulic lines, loosen the set screw, and turn the bearing cylinder in or out until the proper release gap and/or air gap is found. This may take several tries, but take the time now to get it right.
Once you have made all adjustments, check to see that all fittings are tight and re-install the transmission. Be sure to check for fluid leaks and wipe all fluid from the bellhousing as this liquid will cause the clutch to slip should it get on the friction surfaces
After a few runs, check the air/release gap settings again, especially after installing a new clutch assembly, as these gaps will change as the clutch wears in
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