Cat Lift Trucks (& Caterpillar) GP 45:
GM 4.3 starter & ring gear issue

Has anyone run into or have info on a the starter drive not running deep enough in the ring gear to the point that the drive will ride over the top shearing off the nose cone.
Cust replaced engine themselves with an automotive 4.3 but the starter shop say's they are the same for industrial or auto application
  • Posted 27 Jul 2005 01:39
  • Discussion started by Gordo
  • Alberta, Canada
Showing items 1 - 6 of 6 results.
I look forward for anyone that can provide a kit part number for the delay timer thanks
  • Posted 5 May 2023 01:34
  • Reply by stillworkin
  • New York, United States
Ive had the same customer for 38 years, when the 4.3L arrived on their new Cats, after the perkins were discontinued on the V80's series, we had a lot of starter failures, broken bolts and some cracked blocks by the starter bolt hole. the solution was a.05 sec delay accompanied with a starter bracket. These were made by PSI. There is an official memo from MCFA showing the wiring of the delay and they discuss the bracket. I have the memo and will add it when i find it. I have found over the years that the only way to go is to buy directly from PSI the starter, starter bolts and the bracket. The starter is a Nippon denso from Japan and far superior to anything the dealers are handing out or TVH. The delay is seldom seen anymore as the bracket with proper bolts will do the trick. The bolts from PSI came to them by the hundred of thousands when they bought the GM 4.3 litre from GM. These bolts have a smooth bore end before the threads start that actually sits up into the block about 1/4 inch and helps keep the bolt from breaking. I will try and provide pics of the bolts vs a napa auto parts bolt, once i find everything
  • Posted 4 May 2023 05:25
  • Reply by Gassan
  • California, United States
Norcallifttruck@aol.com
www.norcallifttruckrepairs.com
I have been doing this for 25 plus years, I have never seen so many GM 4.3 Starters / Ring gear replacements. We have used Chevy S-10 Pickups with 4.3 motors as our delivery fleet, these trucks go 200,000 miles without a starter, and we start them 30-40 times per day. Mostly Hyster H90, and H110 trucks with GM 4.3 motors come to the shop several times for starter/ring gear. We have some pretty darn good guys at our shop, and it always baffles everybody. We use factory starters/Ring gears, we intall the upgraded brackets, correct bolts, check the shimming with guaged wire, they all fail premature. Cannot figure it out for the life of me. We have seen some trucks come back every year, to pull the motor again. Frustrating.
  • Posted 1 Jan 2018 06:32
  • Reply by GHCat
  • Connecticut, United States
Support & Training
JUst FYI, all forklifts and other industrial applications, the enigines are Industrial/Marine (the same). Also I have seen this starter issue to many times to remember. The Ing delay timer is the major fix, it allows the engine to complete a full rotation before allowing the ingnition system to fire, this gets out any excess fuel out of the sylinders from when the motor was last turned off and gets the momentum in the starters favor. Also make sure that the starter bracket that supports the rear of the starter is in place.
  • Posted 30 Mar 2006 15:04
  • Reply by dan_selph
  • California, United States
Is this a common problem ?
I have seen one failure like the one mentioned but I noticed the starter had been replaced with an offshore starter and the nose of the starter was approx half the thickeness of the oe starter. An oe starter was put in and the problem was solved. Oh for what its worth I had a GM dealer trace the casting # and it came up as a marine unit.
The problem I have seen multible times on the 4.3 GM motor breaking off the starter nosecone has to do with with the engine rocking back while the starter is being energized. This has only been seen on LP units. The fix is a electronic timer placed in line with the ign. coil that will not allow voltage to the coil untill the engine has cranked for around 1/2 second. Yuor MCFA dealer should be able to come up with the kit for this problem.
  • Posted 5 Aug 2005 08:14
  • Reply by nsane
  • Ohio, United States

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