Differences

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--- techtalk:ih:oil03e [2018/12/21 05:39]
hippysmack [Disassembly]
+++ techtalk:ih:oil03e [2021/11/07 19:59]
hippysmack [77-85 Oil Pump Removal and Inspection]
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== IH: Oiling & Lubrication - Sub-03E ======
-====== 77-85 Oil Pump Removal and Inspection ======
+====== 77-85 Oil Pump Removal and Disassembly ======
 ====== Removal ======
   * The 77-85 gerotor pump can be removed with the engine in the frame and the gearcase cover installed.
@@ Line 64: / Line 64: @@
 |  Carburetor Cleaner ((photo by Hippysmack http://xlforum.net/forums/showthread.php?t=2071153&page=4))  |||
-|{{:techtalk:ref:tools:parts_cleaner_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:tools:parts_cleaner_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:parts_cleaner_6_by_hippysmack.jpg?direct&300|}}|
+|{{techtalk:ref:genmsr:parts_cleaner_1_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:genmsr:parts_cleaner_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:parts_cleaner_6_by_hippysmack.jpg?direct&300|}}|
   * After soaking, open the lid, remove the small bucket inside by the handle, set the bucket on the ground and wash the parts cleaner off with a water hose.
@@ Line 73: / Line 73: @@
 |  Cleaning and soaking gaskets for more easy removal ((photos by Hippysmack http://xlforum.net/forums/showthread.php?t=2071153&page=4))  ||
-|{{:techtalk:ref:tools:parts_cleaner_4_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:tools:parts_cleaner_2_by_hippysmack.jpg?direct&300|}}|
+|{{techtalk:ref:genmsr:parts_cleaner_4_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:genmsr:parts_cleaner_2_by_hippysmack.jpg?direct&300|}}|
+|{{:techtalk:ih:oil:77-e83_oil_pump_5.2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_5.3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_5.1_by_hippysmack.jpg?direct&300|}}|
 ====== Disassembly ======
+Wiggle the cover off and the feed gerotors are exposed.
 Once you've gotten the cover off, you can continue to disassemble the pump from here. ((photos by Hippysmack)) \\
@@ Line 96: / Line 97: @@
   * Push in on the outer plate (if needed) to compress the spring and the pin can be removed with pliers or your fingers.
-  * Then the outer plate can be removed.
+    * Then the outer plate can be removed.
     * The notch in the plate mates around the roll pin in the body that keeps it from rotating.
     * It'll have to be lifted straight out or dumped out.
@@ Line 103: / Line 104: @@
 |{{:techtalk:ih:oil:77-e83_oil_pump_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:outer_plate_installed_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-85_oil_pump_spring_washer_installed_by_hippysmack.jpg?direct&300|}}|
-  * Check the position and condition of the outer plate seal before removing it.
+  * **The 77-82 outer plate seal is simply pushed down the gearshaft and onto the inner plate**.
+    * Check the position and condition of the seal before removing it.
   * Remove the seal and the retaining (lock) ring.
     * You can use external lock rings pliers or a small screwdriver or two.
@@ Line 110: / Line 112: @@
 |{{:techtalk:ih:oil:outer_seal_installed_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-85_oil_pump_retaining_ring_location_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_4_by_hippysmack.jpg?direct&300|}}|
+  * **The 83-90 outer plate seal is pressed into the outer plate**.
+    * Check the position and condition of the seal before removing it.
+    * The seal will need to be pressed or pried out.
+    * You can set up a rig as in below (bearing race, a small socket and a rubber hammer).
+  * Make sure the socket is slightly smaller than the outer plate I.D.
+    * Gently tap the socket.
+  * And the seal will fall thru the bearing race (or larger socket etc).
+|{{:techtalk:evo:oil:83-90_outer_plate_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:83-90_outer_plate_4_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:83-90_outer_plate_5_by_hippysmack.jpg?direct&300|}}|
   * Two small drivers were used here (1 to keep the ring from spinning, 1 to raise an end out of the groove in the gearshaft).
-  * The 1st screwdriver can be pushed into the slot in the gerotor to keep the ring from spinning.
+    * The 1st screwdriver can be pushed into the slot in the gerotor to keep the ring from spinning.
-  * This will allow you to pick and out on one end and then switch back and forth between the two from there.
+    * This will allow you to pick and out on one end and then switch back and forth between the two from there.
+  * Remove the retainer clip.
+  * Then pull out the inner plate.
 |{{:techtalk:ih:oil:77-e83_oil_pump_7_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_5_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_6_by_hippysmack.jpg?direct&300|}}|
@@ Line 130: / Line 144: @@
 |{{:techtalk:ih:oil:77-e83_return_gerotors_installed_position_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_9_by_hippysmack.jpg?direct&300|}}|
-  * Remove the gearshaft and set it in a safe place to protect the gears teeth.
+  * Remove the gearshaft and set it in a safe place to protect the gear teeth.
   * Clean all parts with solvent (brake cleaner works well).
   * With the parts spread out you now can now do further inspection on areas noticed while disassembling.
 |{{:techtalk:ih:oil:77-e83_oil_pump_10_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_oil_pump_parts_by_hippysmack.jpg?direct&300|}}|
-====== Gerotors ======
-|{{:techtalk:ih:oil:77-85_oil_pump_feed_gerotors_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-85_oil_pump_scavenger_gerotors_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ih:oil:77-e83_gerotors_by_hippysmack.jpg?direct&300|}}|
-=== Specs and Servicing ===
-With the replacement of the gear driven oil pump by the new gerotor style pump; \\
-HD issued a recommendation to dealers regarding servicing of the new style oil pumps. ((HD Service Bulletin #M-711 dated June 3, 1977))
-  * Zero gerotor (gear) side clearance must be maintained by the flat spring located between the upper and lower gerotor sets in the oil pump to provide adequate oil pressure.  For the spring to function properly, the upper face of the lower feed gerotors must extend slightly above the cover to prevent any side clearance which would allow oil to get past the gerotors and reduce oil pressure. ((HD Service Bulletin #M-711 dated June 3, 1977))
-  * If you encounter reduced oil, no oil pressure (oil pressure light comes on or stays on) or otherwise need to disassemble the oil pump for any reason, the gerotors should be checked and serviced. ((HD Service Bulletin #M-711 dated June 3, 1977))
-  * Using a straightedge across the feed gerotor set (installed) surface, measurement should be taken with a feeler gauge from the gerotor surface to the ridge of the edge of the aluminum cover:
-    * The thin, feed gerotors (26492-75) are in the oil pump cover (26486-75) and should extend .001" - .005" above the cover's aluminum ridge which surrounds them. ((HD Service Bulletin #M-711 dated June 3, 1977))
-    *  The later gerotors extend up to .011" above the ridge.  If the feed gerotors do not extend above the ridge within the specified range, remove them, lay some sandpaper (#280 grit to start - #400 grit to finish), invert the cover and sand the ridge evenly until the gerotors extend properly when inserted. Check the measurement with a micrometer to see that both the inner and outer gerotors are the same thickness. ((HD Service Bulletin #M-711 dated June 3, 1977))
-    * If the widths measure equally but the gerotors are not equal in height when placed into the cover, then the cover surface is not flat and the cover should be replaced.  Be sure to check the gerotors in the new cover using a straight edge to assure a level surface and the proper elevation above the ridge. ((HD Service Bulletin #M-711 dated June 3, 1977))
-  * Another possible cause of low oil pressure is air leakage into the pump due to a loose hose clamp at the oil pump feed hose fitting (63540-62) and at the oil tank feed hose fitting. If the existing feed hose clamp (10020) cannot be evenly and securely crimped to the fittings, remove the clamp and install a worm drive hose clamp. This will prevent air leakage into the system which could cause loss of oil pressure due to an airlock in the oil pump. ((HD Service Bulletin #M-711 dated June 3, 1977))
-  * Oil pump covers found with an uneven gerotor surface should be removed. ((HD Service Bulletin #M-711 dated June 3, 1977))

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