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Re: My new R180
Posted:
Mon Feb 04, 2019 10:04 pmby cornbinder89
If I understand correctly, you want the pump shaft seal, which would be specific to the pump make, If it square and held together with four bolts or studs, it is likely a Commercial Shearing pump, they made a lot of pumps, if is kidney shaped it could be many mfg, Webster, Eaton or other mfg. Your best bet is to pull the pump and take it to a hyd shop.
Re: My new R180
Posted:
Tue Feb 05, 2019 6:27 amby wndsofchng06
cornbinder89 wrote: Your best bet is to pull the pump and take it to a hyd shop.
That's what I was afraid of
Re: My new R180
Posted:
Thu Feb 07, 2019 4:30 pmby wndsofchng06
So I see in the spec sheet it states "constant mesh helical gears in 3rd,4th,and 5th" assuming that's still not synchro.. does that just mean double clutching is easier in those gears?
Re: My new R180
Posted:
Thu Feb 07, 2019 8:30 pmby cornbinder89
No, it just means they are not straight cut in those gears, they are cut on a angle, this makes for a quieter trans but does add thrust into the equation, Most modern trans are helical cut, 1st and rev are still straight cut and will be noise in those gears and 1st is not constant mesh with its counter-part on the countershaft, so when you select that gear, you are moving the whole gear on the shaft and not just a dog-clutch like the other forward gears. Reverse, by definition needs an idler gear between input and output, so it can't be constant mesh.
Re: My new R180
Posted:
Fri Feb 15, 2019 3:52 pmby wndsofchng06
I was reading the glove box door about shifting the rear axle. Seems it must be shifted while moving. Can I shift it to high while parked the start in 1st like normal or it has to be rolling to shift? I'd like to leave it in high while not loaded.
Re: My new R180
Posted:
Fri Feb 15, 2019 4:18 pmby cornbinder89
There is no guarantee the shift will complete unless the axle is in motion. depending on the method of shifting, it may or may not remain in high with the engine off. Vacuum and air will not, electric might depending on how it is wired.
If the driveshaft has the parking brake, it is possible to have the axle dis-engage and the truck roll a way all with the parking brake applied.
All in all it is best to park in low and leave it there.
The axle itself doesn't have a spring or detent to hold it in one position or the other. Vacuum and air shifter are spring loaded to the low position, air pressure moves the shift fork. Electric shifter use a torsion spring to pull the shifter to one position or the other, the motor winds up the tension on the spring, but it is the spring force that completes the shift.
Parking in low gives a driveshaft parking brake the best chance at holding. Shifting the position when not in motion, the spring may be wound up, but the load on the gears prevent it from shifting, until the truck gets bumped, then it may get stuck in between high and low.
Re: My new R180
Posted:
Fri Feb 15, 2019 4:27 pmby wndsofchng06
cornbinder89 wrote:There is no guarantee the shift will complete unless the axle is in motion. depending on the method of shifting, it may or may not remain in high with the engine off. Vacuum and air will not, electric might depending on how it is wired.
If the driveshaft has the parking brake, it is possible to have the axle dis-engage and the truck roll a way all with the parking brake applied.
All in all it is best to park in low and leave it there.
The axle itself doesn't have a spring or detent to hold it in one position or the other. Vacuum and air shifter are spring loaded to the low position, air pressure moves the shift fork. Electric shifter use a torsion spring to pull the shifter to one position or the other, the motor winds up the tension on the spring, but it is the spring force that completes the shift.
Parking in low gives a driveshaft parking brake the best chance at holding. Shifting the position when not in motion, the spring may be wound up, but the load on the gears prevent it from shifting, until the truck gets bumped, then it may get stuck in between high and low.
Good info. Electric shift here but I won't chance it.
Re: My new R180
Posted:
Fri Feb 15, 2019 4:39 pmby cornbinder89
My Marmon with 15 spd and 2 spd rears, I run up to top gear (50 mph) in low than shift to high and make the last two shifts again. My K-7 which will be closer to what you have, I start in 2nd low, then 3rd low, 3rd high, 4 low, 4 high and then 5th high. If I am heavy loaded, 5 ton in the back, I'll split them more, and if on a slight down hill, I'll go from 3rd high to 4th high and skip the split.
Drive the truck a bit, and you'll find what works best for you.
Both my trucks will return to low if not selected when air/vacuum bleeds off, so I place them there when I park.
Re: My new R180
Posted:
Fri Mar 08, 2019 5:53 pmby wndsofchng06
My "new" door came in today. FedEx all the way from Maine! Solid with only surface rust!
Re: My new R180
Posted:
Sat Mar 09, 2019 8:30 amby manicmechanic
Nice door