Official HPI Hellfire Thread
#1802
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RE: Official HPI Hellfire Thread
Its pressed on. take the pilot nut off and then if it doesnt just slide off you can tap the back side with the handle of a screw driver. Shouldnt have to tap it hard
#1803
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RE: Official HPI Hellfire Thread
Thanks, that worked.
by chance do you know how to remove the crank. Looks like i need to push the bearing out (near the flywheel) but I'm having a hard time getting pushed out.
by chance do you know how to remove the crank. Looks like i need to push the bearing out (near the flywheel) but I'm having a hard time getting pushed out.
#1806
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RE: Official HPI Hellfire Thread
No problem. Everyone had a first time.
Take the head and the back plate off. Turn the crank so the piston is at its lowest then slide the piston shaft off the crank. The piston will come out the top of the head. After that you can take the crank out the back.
Just curious why are you taking it apart?
Take the head and the back plate off. Turn the crank so the piston is at its lowest then slide the piston shaft off the crank. The piston will come out the top of the head. After that you can take the crank out the back.
Just curious why are you taking it apart?
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RE: Official HPI Hellfire Thread
I guess I should have told you, this is a Losi M26SS. Iwent to the Hellfire because the flywheel is HPI. But the rest is Losi stuff......
I went to start it today and it wouldn't crank over, took it apart and found the spin start part was broken. Took it apart more and found the piston head had pits in it, along with the cylinder head. So I need to rebuild it I guess. When I put the piston to the lowest point, I can't slide the connectingrod of the crank because there is a lip. I moved the pistonto the top, still won't slide off the crank.
Any other ideas?
I went to start it today and it wouldn't crank over, took it apart and found the spin start part was broken. Took it apart more and found the piston head had pits in it, along with the cylinder head. So I need to rebuild it I guess. When I put the piston to the lowest point, I can't slide the connectingrod of the crank because there is a lip. I moved the pistonto the top, still won't slide off the crank.
Any other ideas?
#1811
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RE: Official HPI Hellfire Thread
Sometimes it can be a real hassle to get out depending on the engine and other times it almost falls out. If you keep trying you will get it. Just be careful not to scratch any internal parts.
The first time i did it was a pain and scary. But now i could almost take and engine apart with my eyes shut. You will be ok.
My hitech 985 servo craped itself after 2 years of abuse. No $ to get another. Havent bashed my HF for 2 weeks.[]
The first time i did it was a pain and scary. But now i could almost take and engine apart with my eyes shut. You will be ok.
My hitech 985 servo craped itself after 2 years of abuse. No $ to get another. Havent bashed my HF for 2 weeks.[]
#1813
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RE: Official HPI Hellfire Thread
SWEET!!! After I removed the sleeve, I got the piston and connecting rod out. Thanks for the help.
I hait to assume, but it's cheaper to rebuild versus buying a new enigine. I figured I would go ahead and replace the clyinder head, piston, sleeve, connecting rod, pin and c clip.
What is the difference in the washer that's between the cylinder head and piston sleeve?
Thicker: more compression
Thinner: less compression
Thanks again for your knowledge and help.
I hait to assume, but it's cheaper to rebuild versus buying a new enigine. I figured I would go ahead and replace the clyinder head, piston, sleeve, connecting rod, pin and c clip.
What is the difference in the washer that's between the cylinder head and piston sleeve?
Thicker: more compression
Thinner: less compression
Thanks again for your knowledge and help.
#1814
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RE: Official HPI Hellfire Thread
Hmm, not positive on that one. I know you can change it to use different nitro content but Im not sure which size does what. Stussman maybe?
#1815
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RE: Official HPI Hellfire Thread
ORIGINAL: gpracer
SWEET!!! After I removed the sleeve, I got the piston and connecting rod out. Thanks for the help.
I hait to assume, but it's cheaper to rebuild versus buying a new enigine. I figured I would go ahead and replace the clyinder head, piston, sleeve, connecting rod, pin and c clip.
What is the difference in the washer that's between the cylinder head and piston sleeve?
Thicker: more compression
Thinner: less compression
Thanks again for your knowledge and help.
SWEET!!! After I removed the sleeve, I got the piston and connecting rod out. Thanks for the help.
I hait to assume, but it's cheaper to rebuild versus buying a new enigine. I figured I would go ahead and replace the clyinder head, piston, sleeve, connecting rod, pin and c clip.
What is the difference in the washer that's between the cylinder head and piston sleeve?
Thicker: more compression
Thinner: less compression
Thanks again for your knowledge and help.
Less shims gives more compression which can give more power but to much compression results in early detonation in the chamber which can damage the engine. Research the engine and see how many shims you need.
Pitting on the piston head and button can be a result of early detonation. I damaged an os28 last year because i took 1 to many shims out it badly pitted the piston and button.
I would only rebuild an engine if it was an expensive engine. Most cheap to mid range engine arent worth rebuilding. By the time you check the cost between the rebuild and upgrading to a better engine it isnt worth it.
#1816
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RE: Official HPI Hellfire Thread
ORIGINAL: KeithjV
The pin came out of my rear drive shaft the other day. Havent had time to take it apart and reinstall it yet
The pin came out of my rear drive shaft the other day. Havent had time to take it apart and reinstall it yet
#1817
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RE: Official HPI Hellfire Thread
Great info there stuss.
I dont think the pin broke. It looks like it just worked its way out. The pin was sticking partly out of the shaft. Im going to take a closer look at it tomorrow.
I dont think the pin broke. It looks like it just worked its way out. The pin was sticking partly out of the shaft. Im going to take a closer look at it tomorrow.
#1818
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RE: Official HPI Hellfire Thread
People, I snapped the "rip cord"on my Hellfire... went out and bought a Ofna starter box used (good shape).
Now, I tried it, but it seems too weak to the motor to turn over... plus it "skids"all over the cog that it's supposed to turn.. doesn't seem to stick to it well enough.
Any suggestions as to what I'm doing wrong?
Now, I tried it, but it seems too weak to the motor to turn over... plus it "skids"all over the cog that it's supposed to turn.. doesn't seem to stick to it well enough.
Any suggestions as to what I'm doing wrong?
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RE: Official HPI Hellfire Thread
ORIGINAL: littleredrooster679
People, I snapped the ''rip cord'' on my Hellfire... went out and bought a Ofna starter box used (good shape).
Now, I tried it, but it seems too weak to the motor to turn over... plus it ''skids'' all over the cog that it's supposed to turn.. doesn't seem to stick to it well enough.
Any suggestions as to what I'm doing wrong?
People, I snapped the ''rip cord'' on my Hellfire... went out and bought a Ofna starter box used (good shape).
Now, I tried it, but it seems too weak to the motor to turn over... plus it ''skids'' all over the cog that it's supposed to turn.. doesn't seem to stick to it well enough.
Any suggestions as to what I'm doing wrong?
#1821
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RE: Official HPI Hellfire Thread
I finally had a decent bash again with my HF. Bent the rear suspension mount during a long cartwheel off a high bank,The servo i swapped from steering to throttle craped itself and i had a runaway but no damage. Also destroyed a rear tyre running on a dry dam bed which had many sharp sticks. Good fun.
#1822
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RE: Official HPI Hellfire Thread
Im waiting for my new servo horn to get here so I can get my HF going again. The Hitec servo I put in for steering keeps eating the plastic horns.