phazerowner
New member
I recently removed the oil pump from a Phazer I got last year to lube it up and put on a new cable. I checked my manual for the specs for the pump stroke and they were much different for the minimum pump stroke than my actual measurements were.
By the way these measurements were done with a new oil cable installed. Also, the oil pump was working last year when the sled was used.
The manual says the minimum stroke is between 0.006" -0.008" , and measurements are to be taken between the raised boss and the adjusting plate. Also the manual says to turn the drive gear until the plunger is at the MINIMUM distance from the pump body. This makes no sense! IS this a typo? Should the manual read "Maximum distance from the pump body"? When I turn the gear to the min. distance there is Zero clearence at the measuring point no matter how many shims I add. I'm I missing something or is this a TYPO?
The maximum pump stroke should be between 0.064" - 0.071". To measure maximum stroke, the oil cable is pulled all the way out. The max stroke measurement from my pump was 0.0064 and appears to be correct.
Has anyone encountered this problem? Any suggestions would be helpful. Thanks, phazerowner
By the way these measurements were done with a new oil cable installed. Also, the oil pump was working last year when the sled was used.
The manual says the minimum stroke is between 0.006" -0.008" , and measurements are to be taken between the raised boss and the adjusting plate. Also the manual says to turn the drive gear until the plunger is at the MINIMUM distance from the pump body. This makes no sense! IS this a typo? Should the manual read "Maximum distance from the pump body"? When I turn the gear to the min. distance there is Zero clearence at the measuring point no matter how many shims I add. I'm I missing something or is this a TYPO?
The maximum pump stroke should be between 0.064" - 0.071". To measure maximum stroke, the oil cable is pulled all the way out. The max stroke measurement from my pump was 0.0064 and appears to be correct.
Has anyone encountered this problem? Any suggestions would be helpful. Thanks, phazerowner
Phazer
New member
Remember, the nut and plunger move up and down. The "boss" (which is that black piece that the cable hooks to) rotates "down and away" from the washer when you twist the throttle. So in other words, the plunger is always "all the way out". When you twist the throttle, the boss rotates down and lets the stroke increase (deeper into the pump). It actually retracts into the pump further. Hence, it has a greater stroke. Another way (just to confuse you). Minimum setting is the minimum amount of retraction. The black disc never rotates lower than the center aluminum piece that it pivots around. Otherwise the washer would beat it mushroomed shaped.
If you reach in and rotate the gear with your finger (cable relaxed), you'll see the short stroke action of the plunger. Have someone pull and hold the cable and spin the gear again, and you'll see the long stroke action.
Clear as mud??????
If you reach in and rotate the gear with your finger (cable relaxed), you'll see the short stroke action of the plunger. Have someone pull and hold the cable and spin the gear again, and you'll see the long stroke action.
Clear as mud??????
800
New member
start the motor set the idle, shut it off. pull the oil cable out of the holder on the carbs, the gap should be 25mm, I always set them a little shorter.....
phazerowner
New member
Phazer said:
Phazer,
Ok, I see what your saying. But the "boss" or black disc is even with center alum. piece only when the plunger is at full minimum stroke, in other words when the gear is rotated and the adjusting plate is the furthest point from the raised portion of the boss. When the gear is rotated to the minimum stroke the boss is maybe 2 mm above the aluminum shaft. The boss dosen't appear to be damaged however. If I put a feeler gauge in between the plate and the raised boss portion at full short stroke the measurement is 0.008 IN. My manual says this gap should occur when the gear is rotated to the minimum, (not maximum), boss/ plate clearence, that's why I thought there may be a typo.
The only way I could get the 0.008 IN space at the minimum pump stroke was to add two 1mm shimms and a .5 mm washer in addition to the stock gold 1.5 mm shim. When I pulled out the oil cable to it's farthest point and measure maximum pump stroke at the boss, the measurement was still 0.064 which is within the specified limits. Is this correct? This seems like an awful lot off shimming, (essentialy more than doubling what was there in stock form).
Also, if I use this many shims the alum shaft is now 4mm below the boss and is pretty much not visible at minimum pump stroke. This can't be correct?! Thanks for your help phazerowner
Phazer
New member
Do you have a spring under your black disc to push it up?
On mine, with cable relaxed, the boss sticks up above the center aluminum snout almost 1/4". With the pluger "in" (rotate gear using finger), the measurment in my Clymer manual say .006-.008. Then to check maximum, pull and hold cable, rotate gear until plunger is fully extended. Clymer says (get this...), 1.62-1.8 mm (1.064-1.071). There is noway that you can get over an inch of travel. Anyway...the conversion works out to .063-.070. Looks like somewhere between .057-.062 total maximum travel.
On mine, with cable relaxed, the boss sticks up above the center aluminum snout almost 1/4". With the pluger "in" (rotate gear using finger), the measurment in my Clymer manual say .006-.008. Then to check maximum, pull and hold cable, rotate gear until plunger is fully extended. Clymer says (get this...), 1.62-1.8 mm (1.064-1.071). There is noway that you can get over an inch of travel. Anyway...the conversion works out to .063-.070. Looks like somewhere between .057-.062 total maximum travel.
Phazer
New member
I think their interpretation of "minimum stroke" is: The widest gap you can get, without pulling the cable and having the plunger down. Remove shims for more clearance.
Maximum stroke is: Widest gap you can get by pulling the cable and having the plunger up.
Maximum stroke is: Widest gap you can get by pulling the cable and having the plunger up.
phazerowner
New member
Phazer,
Yes I do have a good spring under the boss.
I tried removing the large gold shim under my boss.
when rotating the gear there is no gap between the boss and the plate at all. The boss moves up with the rotation and takes up the space.
The manual says add shims to increase stroke and remove shims to decrease stroke.
I did notice a small groove in the rolled pin that holds the boss onto the alum. post so I removed the pin, rotated it slightly and re-installed it. Someone on the Snowwest forum told me to check this. Upon re-checking the min stroke with the cable relaxed and at the minimum clearance, I still have Zero clearance.
How many shims do you have installed under your adjusting plate? Thanks, Bryan
Yes I do have a good spring under the boss.
I tried removing the large gold shim under my boss.
when rotating the gear there is no gap between the boss and the plate at all. The boss moves up with the rotation and takes up the space.
The manual says add shims to increase stroke and remove shims to decrease stroke.
I did notice a small groove in the rolled pin that holds the boss onto the alum. post so I removed the pin, rotated it slightly and re-installed it. Someone on the Snowwest forum told me to check this. Upon re-checking the min stroke with the cable relaxed and at the minimum clearance, I still have Zero clearance.
How many shims do you have installed under your adjusting plate? Thanks, Bryan
Phazer
New member
I can't remember how many shims mine had. I've been looking at an old pump I have here in the garage (it's got no spring, no shims, no nut). And reading my clymers manual.