View previous topic :: View next topic |
Author |
Message |
tntractor Regular
Joined: 28 Nov 2004 Posts: 130
Report to Moderator
|
Posted: Thu Jan 11, 2018 9:39 pm Post subject: screwdriver test |
|
|
If a 1600 has been sitting for a while, should I do the screwdriver test before trying to
start it? Also, will one of those engines go into a 77? |
|
Back to top |
|
 |
oliverkid Long Time User
Joined: 07 May 2009 Posts: 986 Location: Michigan
Report to Moderator
|
Posted: Thu Jan 11, 2018 11:23 pm Post subject: Re: screwdriver test |
|
|
1600 is a rosa master pump not a Bosch. Completely different animal so there is no screwdriver test. |
|
Back to top |
|
 |
NYOlivers Regular
Joined: 03 Sep 2017 Posts: 451
Report to Moderator
|
Posted: Fri Jan 12, 2018 2:56 am Post subject: Re: screwdriver test |
|
|
I would make sure you have good clean fuel to all the filters and at the injection pump. Prime fuel system with hand pump on lift pump. A good battery, check oil and should be good. |
|
Back to top |
|
 |
Olliejunkie Tractor Expert
Joined: 22 May 2016 Posts: 2382 Location: Eugene Oregon
Report to Moderator
|
Posted: Fri Jan 12, 2018 6:57 am Post subject: Re: screwdriver test |
|
|
Roosa pumps can stick too. I don't know how to check them. I don't know if they run away but I would be ready to shut the air off. |
|
Back to top |
|
 |
rrman61 Long Time User
Joined: 02 Oct 2011 Posts: 803
Report to Moderator
|
Posted: Fri Jan 12, 2018 7:36 am Post subject: Re: screwdriver test |
|
|
How about a 1650? |
|
Back to top |
|
 |
Tramway Guy Tractor Expert
Joined: 04 Oct 2003 Posts: 2890
Report to Moderator
|
Posted: Fri Jan 12, 2018 7:45 am Post subject: Re: screwdriver test |
|
|
There is a ?screwdriver test? only on American Bosch PSB pumps. Not Roosa Master or any in-line pumps. Those Vosch pumps were used on all 66, 77, 88 and 99 (6-cylinder) as well as Super variants of all those (except for a trial run of very few Super 77s with the Roosa Master) Super 55, and the 3-digit models through about 1961 or so, maybe later. None of the 4-digit tractors had Bosch pumps from the factory. |
|
Back to top |
|
 |
Dieseltech Tractor Guru
Joined: 29 Feb 2012 Posts: 6837 Location: Indiana
Report to Moderator
|
Posted: Fri Jan 12, 2018 8:23 am Post subject: Re: screwdriver test |
|
|
It's Stanadyne/Roosa on both early indirect and late direct injected diesels. Pumps and injectors are different though. |
|
Back to top |
|
 |
NYOlivers Regular
Joined: 03 Sep 2017 Posts: 451
Report to Moderator
|
Posted: Fri Jan 12, 2018 12:11 pm Post subject: Re: screwdriver test |
|
|
Hey Dieseltech: can you explain the "screwdriver test" for people who don't know what it is? Also what should be done to Bosch pumps if they do sit for awhile and what can be done to prevent them from sticking? I know its a little off the original thread, but it did get brought up so I though it would be a time for a refresher. Thanks |
|
Back to top |
|
 |
Dieseltech Tractor Guru
Joined: 29 Feb 2012 Posts: 6837 Location: Indiana
Report to Moderator
|
Posted: Fri Jan 12, 2018 1:54 pm Post subject: Re: screwdriver test |
|
|
It's some times helpful on the American Bosch PSB pumps, after removing the fuel control unit and using a small pick or screwdriver to see if the plunger metering sleeve will move up/down freely. Most are stuck after setting awhile, and when the plunger is stuck just turning the engine with stuck internal parts wrecks the pump. Even a free metering sleeve does not mean the plunger is free too though. |
|
Back to top |
|
 |
|