|Juan's 2004 100 series Landcruiser gets a front Harrop and Nitro 488R gears|
|(66 BIG pics loading)|
|January 4 2018|
|Juan shipped me both of his diffs from Alabama. The Harrop elocker can be seen with the Nitro product.|
|A solid collar will be added and new flange, also.|
|Both caps are marked in such a way that they cannot get flipped around or interchanged.|
|Start with pressing the old pinion out.|
|Now press the outer race out. The large inner race also gets pressed out.|
|Take this nasty looking CV axle seal out.|
|Both related bodies have been cleaned properly.|
|All loose grit has been removed...mostly with a toothbrush size wire brush.|
|With everything stripped down and clean, now the new Koyo inner race can be tapped in place.|
|Verified 100% seated down.|
|Same with the new outer race....100 seated down.|
|.076" will be the 1st try at proper pinion shim depth.|
|The new pinion bearing is pressed on with the 076 shim.|
| This is just for a paint test but I was curious ....and wanted to show off my fairly new torque measuring tool. |
A modest 8 in/lb of torque but just fine for this paint test.
| Surfaces are checked with a file and no unusual burrs were found. |
Carrier bearings and the ring gear do need to be mounted up.
|As indicated by my dainty grip near the hammer head, this ring gear went on easy. More of a slip fit.|
|71 ft/lb per the fsm and a little blue Loctite.|
|With the right widget, the new carrier bearings can be tapped into place.|
|Then the Harrop case is loaded in place and caps tightened up.|
| Re-using the existing washer plates resulted in 22 in/lb of total preload.....a little high but ok for a paint test. |
The backlash was about .008" so no issues there.
| Drive side....the pattern depth seems surprisingly good and appears to be a keeper. |
Slight favoring to the heel but very little can be done about that.
|Coast....appears to be at the ideal depth and well centered in the tooth.|
|Comet tail is not harshly tucked into the root.|
|Easier to see the comet tail trying to be a bit in the center.|
| Really easy to see it in this shot....the comet tail is indeed in the center |
and that means the pinion shim is in a "slight deep" state and leave it alone.
|With depth established, now to install the solid collar.|
|On the second try, the perfect shimming was found.|
|This is a good quality seal made by THO in Japan so let's use it.|
|"THO" located in Japan.|
|New flange style nut.|
|Pinion preload was verified with the torque wrench. A nice, smooth 10 inch/pounds of pinion preload.|
|DING! and this end is done.|
|For setting the backlash and carrier bearing preloads, a good selection of washer plates is a plus.|
|A fine tuning of the backlash while reducing the preload somewhat was the goal and .117" on the left side did the trick.|
|Backlash was recorded on approximately every other tooth.|
|The 4 bearing cap bolts were verified to be at 63 ft/lb per the fsm.|
| Good luck finding installation notes on the A10976 Harrop because there are none.|
Common sense goes a long way :) Some grinding on the caps.
|Drill the 29/64" hole just about where it is shown here. Coat the rubber grommet with black rtv.|
|And it slides thru as easy as butter maybe.|
|Here's what the placement looks like on the outside.|
| This is a picture that Juan sent me of the nearly finished installation under his Cruiser and there is |
plenty of room for the connection on top. No interference issues.
|Back to the testing of the Harrop....the measured resistance was 3.9 ohms.|
| Now the 12 volt battery test. No polarity on these 2 black wires|
so it does not make any difference which way it is hooked up....
just as long as it is hooked up.
| Apply red to (-) and black to (+)....or is it the other way around |
It makes no difference. :)
| With the electromagnet engaged, the ramp ring is held firmly to it.|
So turning the pinion flange which turns the ring gear results in
the 3 engagement pins being pushed in the case. The locker is fully engaged now.
|Notes are scribed on the ring gear.|
|Seals are next.|
|This CV side seal is fully in now.|
|Aluminum cover is clean....|
|...apply the FIPG.|
|Tighten the 9 bolts to 34 ft/lb per the fsm. One of the 9 is a hidden bolt.|
|My notes of the install of the 488 gears and the Harrop.|
|Ready for the trip back to Alabama.|
|Some fsm pages of the 8" IFS that I would like to share.|