Differences

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--- techtalk:ih:oil01u [2020/09/15 01:15]
hippysmack [Plugging the Valve / Hole]
+++ techtalk:ih:oil01u [2021/02/19 15:52]
hippysmack [Venting the Primary]
@@ Line 16: / Line 16: @@
 (where the air is expelled along with crankcase pressure out the breather vent) \\
 Without a vent once the transfer valve is plugged off, primary venting is severely hindered if not bottled up entirely. \\
-It is possible to blow the sprocket seal without a vent to atmosphere over the primary or tranny. \\
+It is possible to blow the sprocket seal, starter gasket or primary gasket without a vent to atmosphere over the primary or tranny. \\
 See Venting the Primary below. \\
@@ Line 34: / Line 34: @@
-|  The transfer below valve below was packed with JB Weld to negate it's operation. ((photos by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1095756#post1095756))  ||
+|  The transfer below valve below was packed with JB Weld to negate it's operation. ((photos by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1095756#post1095756))  ||  Transfer valve removed, plug installed. ((photo by lofimofo of the XLFORUM http://xlforum.net/forums/showthread.php?t=1578633))  |
-|{{:techtalk:ih:oil:plugging_the_transfer_valve_1_by_jtrapass.jpg?direct&300|}}| {{:techtalk:ih:oil:plugging_the_transfer_valve_2_by_jtrapass.jpg?direct&300|}}|
+|{{:techtalk:ih:oil:plugging_the_transfer_valve_1_by_jtrapass.jpg?direct&300|}}| {{:techtalk:ih:oil:plugging_the_transfer_valve_2_by_jtrapass.jpg?direct&300|}}|{{:techtalk:ih:oil:transfer_valve_hole_plugged_by_lofimofo.jpg?direct&300|}}|
 ====== Venting the Primary ======
@@ Line 41: / Line 41: @@
 With the transfer valve plugged, the primary can't breath as it can with the transfer valve functioning. \\
 That air path would now be blocked. \\
-Technically, the primary has a vent other than the transfer valve being the clearance in the clutch cable where it enters the primary. \\
+Technically, the primary may have a vent other than the transfer valve being the clearance in the clutch cable where it enters the primary. \\
 That can also act as a vent as air can enter and escape there (the part where the actual cable goes into the threaded piece that screws into the clutch cable hole). ((Buck101 of the XLFORUM http://xlforum.net/forums/showthread.php?t=150130&page=4)) ((CrazyHorse of the XLFORUM http://xlforum.net/forums/showthread.php?t=150130&page=4)) \\
 There is slack (slop) where the cable end is pressure fitted ( by slack adjustment of cable) into the threaded piece. \\
@@ Line 49: / Line 49: @@
 **Installing a dedicated primary vent**: \\
-  * **You can drill a tiny hole in the primary access plug if yours doesn't have one as a vent**. \\
+  * **You'd think you could use the hole in the primary access plug as a vent**.
-  * **You can use the 77-up venting location on 70-76 engines**:
+    * However, any non-tin cover bike with a blocked transfer will piss out the vent of the primary filler plug. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=3)) \\ It's usually futile to retain the plug vent due to oil weep. Plugging that vent and installing a vent some where else is a good route.
+    * The primary filler plug part numbers are (34742-52A) for 54-70 and (34742-71) for 71 to 76. (Fridge of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=3))
+  * **You can use the 77-80 venting location on 70-76 engines**:
     * You can install a vent plug (like the 34744-77 tranny vent) through one of the holes on top of the cases, just in front of the rear engine mount bracket.
     * Those two bolt holes are used for the oil tank bracket (xlch model) or battery carrier bracket (xlh model). ((JBM of the XLFORUM http://xlforum.net/forums/showthread.php?t=146064)) \\ '77-up ironheads have this 3/4"x16 vent fitting factory installed in this location (transfer valve deleted in '77).
@@ Line 67: / Line 69: @@
 {{:techtalk:ih:oil:installing_a_transmission_vent_1_by_jtrapass.jpg?direct&300|}} ((photo by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1082313#post1082313)) {{:techtalk:ih:oil:installing_a_transmission_vent_2_by_jtrapass.jpg?direct&300|}} ((photo by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1082313#post1082313)) \\
+-1980 models use a fitting (34744-77) with a SAE 3/8" x 16 (x app. 7/16") bolt pattern that has a 1/4" hose nipple on the other end. \\
+{{:techtalk:ih:oil:1977_tranny_vent_pic3_by_on_.....jpg?direct&300|}} ((photo by on½.... of the XLFORUM http://xlforum.net/forums/showthread.php?p=5541672&highlight=transmission+vent#post5541672)) {{:techtalk:ih:oil:1977-1978_transmission_vent_by_hopper.jpg?direct&300|}} ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=209347&page=11)) \\

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