Author Topic: SR2 starter replacement  (Read 13084 times)

old seagull man

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Re: SR2 starter replacement
« Reply #60 on: April 15, 2022, 05:47:42 PM »
Sometimes you just have to take off the covers and get out some tools and start measuring.

Vernier calipers are your friend.

Sometimes your lucky and can move things around a get some measurement without disemboweling everything.
Often even if you cant find the numbers on a bearing, a supplier can sort you out just from the measurements.

My ST 10 head had nothing written on the bearings.

All my Chinese genheads now have Timkin or NSK  bearings, And I know they are far better then anything, China was going to install.

Best of Luck.

cobbadog

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Re: SR2 starter replacement
« Reply #61 on: April 16, 2022, 06:43:27 AM »
Yeah, strip it down, knock the bearings off and drop them on the counter at your bearing shop. Nothing too hard about that just a bit of time. Clean up the armature and look at the brushes and replace if you feel they are worn.
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KC7NOA

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Re: SR2 starter replacement
« Reply #62 on: April 17, 2022, 01:58:10 PM »
Ok, ... I don't want to break this ... but how does this come off


https://imgur.com/xYbVO9v

KC7NOA

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Re: SR2 starter replacement
« Reply #63 on: April 17, 2022, 02:19:25 PM »
Sigh
« Last Edit: April 17, 2022, 02:26:30 PM by KC7NOA »

KC7NOA

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Re: SR2 starter replacement
« Reply #64 on: April 17, 2022, 02:25:03 PM »


« Last Edit: April 17, 2022, 02:28:52 PM by KC7NOA »

32 coupe

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Re: SR2 starter replacement
« Reply #65 on: April 17, 2022, 06:29:37 PM »
What do the bolts on the back do ?
Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
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KC7NOA

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Re: SR2 starter replacement
« Reply #66 on: April 17, 2022, 09:08:18 PM »
Not much yet ...

I think they hold and squeeze two halves together and grab the shaft ... as well as has a keyway...

I pried on the back ... ie , pushing twards the right .. only bending the heads some ...


32 coupe

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Re: SR2 starter replacement
« Reply #67 on: April 17, 2022, 10:45:36 PM »
Looks like a taper fit pulley.
The bolts pull the pulley on to the taper.
I would try some heat.

Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

cobbadog

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Re: SR2 starter replacement
« Reply #68 on: April 18, 2022, 06:38:29 AM »
The bolts wont be there just for good looks. It appears that maybe those bolts hold the front section of the belt pulley. A clear picture of the front of the pulley would also help work out how it is removed. You might find the lot is on a taper but my feelings say not just a taper fit. do what you have done already and loosen all those bolts at the rear of the belt pulley to see if that section will move forward leaving the flat section on the shaft then there should be a nut holding the flat section in place and possibly on a keyway.
Dont force anything until we confirm what it looks like at the front end.
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KC7NOA

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Re: SR2 starter replacement
« Reply #69 on: April 18, 2022, 03:19:57 PM »
I dont see much ...


broncodriver99

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Re: SR2 starter replacement
« Reply #70 on: April 18, 2022, 04:35:31 PM »
Yes, that is a taper lock pulley. There should be two threaded holes in the hub face that can be used to jack the pulley off of the sheave with bolts. The problem is someone has installed that pulley and sheave backwards so it is likely going to be difficult to get it apart. The bolts should be facing out so it can be serviced. Do the bolts in the pulley contact the snout on the generator if you back them out?

32 coupe

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Re: SR2 starter replacement
« Reply #71 on: April 18, 2022, 05:26:03 PM »
Wire brush, sand paper, penetrating oil, heat and patience.

Gear puller ?
« Last Edit: April 19, 2022, 01:37:03 AM by 32 coupe »
Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

KC7NOA

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Re: SR2 starter replacement
« Reply #72 on: April 18, 2022, 08:12:16 PM »
Yes, they will contact the snout ... there is about a 1/4" clearance between hub and bolt heads -- just under

Yes, that is a taper lock pulley. There should be two threaded holes in the hub face that can be used to jack the pulley off of the sheave with bolts. The problem is someone has installed that pulley and sheave backwards so it is likely going to be difficult to get it apart. The bolts should be facing out so it can be serviced. Do the bolts in the pulley contact the snout on the generator if you back them out?

KC7NOA

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Re: SR2 starter replacement
« Reply #73 on: April 18, 2022, 09:04:25 PM »
do what you have done already and loosen all those bolts at the rear of the belt pulley to see if that section will move forward leaving the flat section on the shaft then there should be a nut holding the flat section in place and possibly on a keyway.

There is a allen screw that goes into the keyway... iv not loosened it yet ..

cobbadog

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Re: SR2 starter replacement
« Reply #74 on: April 19, 2022, 06:46:09 AM »
Not seen or heard of this type of pulley but it sounds as though you are in between a rock and a hard place. Where is the allen screw? I would at least remove it if possible and start with the Lanox down there.
As suggested clean that shaft up to be free of all rust using a file, scraper and emery cloth. Is there a way of doing those 2 bolts up until they touch the pulley then put some packing in between the housing and heads and undo them to put a bit of pressure on the pulley lock system? Then it is time for some serious heat and a bit of tapping the pulley.
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