Ric Hamilton
New User
This message is a reply to an archived post by Tony in Mass. on September 21, 2011 at 08:32:58.
The original subject was "Re: Massey 1135 injection pump problem".
"Cav" pump problems like you mentioned, not shutting off or even not running,
On the other end of the sliding shut off "rod", (stamped flat metal thingy)Under the cap of the Cav Injection Pump is a kind of flipper looking paddle that ends up sitting to low and rests on the pump body, causing friction hang ups, What I do is remove the screws/studs that hold these parts down and pull out the paddle looking "thingy" and put a light small spring AROUND the shaft on the paddle "thingy" that will give it just enough tension to hold the paddle above the surface of the pump body. When you put the cap back on ,make sure the hooked end of the rod engages with the piece going through the cap, you can hold up the cap a little bit(and peek) on the opposite side where the shut off lever is and work the shut off back and forth to see that the flat internal rod is moving back and forth and moving the paddle thing, The throttle spring connection under the cap is almost always on the end hole, leave it there(if you lost track of the hole it was in). If you have to make a new top cover gasket, make it out of thin petroleum proof material, DO NOT USE SEALER OR ANY KIND OF GASKET CEMENT!! That should fix up ghosts in the machine shut off / run problems, You can do this without removal of the pump, If you have to remove the pump, MARK ITS POSITION with a punch, then there are the 3 mounting nuts(maybe bolts)and take off the SMALL cover on the FRONT timing cover(usually 4 bolts),sometimes its where the add oil spout is put, depending on model, BECAUSE there is an Allen bolt holding the drive gear on the front of the pump(5/16 or 3/8 I think),remove the injector lines (easier to re and re pump),Remove fuel supply and return lines only at Pump.Sometimes lower rad hose is in the way, REMOVE IT.
The Pump only fits back on One way (master spline)So don't worry. You can use gasket goop or sealer on the timing cover piece.
Good luck
Ric
The original subject was "Re: Massey 1135 injection pump problem".
"Cav" pump problems like you mentioned, not shutting off or even not running,
On the other end of the sliding shut off "rod", (stamped flat metal thingy)Under the cap of the Cav Injection Pump is a kind of flipper looking paddle that ends up sitting to low and rests on the pump body, causing friction hang ups, What I do is remove the screws/studs that hold these parts down and pull out the paddle looking "thingy" and put a light small spring AROUND the shaft on the paddle "thingy" that will give it just enough tension to hold the paddle above the surface of the pump body. When you put the cap back on ,make sure the hooked end of the rod engages with the piece going through the cap, you can hold up the cap a little bit(and peek) on the opposite side where the shut off lever is and work the shut off back and forth to see that the flat internal rod is moving back and forth and moving the paddle thing, The throttle spring connection under the cap is almost always on the end hole, leave it there(if you lost track of the hole it was in). If you have to make a new top cover gasket, make it out of thin petroleum proof material, DO NOT USE SEALER OR ANY KIND OF GASKET CEMENT!! That should fix up ghosts in the machine shut off / run problems, You can do this without removal of the pump, If you have to remove the pump, MARK ITS POSITION with a punch, then there are the 3 mounting nuts(maybe bolts)and take off the SMALL cover on the FRONT timing cover(usually 4 bolts),sometimes its where the add oil spout is put, depending on model, BECAUSE there is an Allen bolt holding the drive gear on the front of the pump(5/16 or 3/8 I think),remove the injector lines (easier to re and re pump),Remove fuel supply and return lines only at Pump.Sometimes lower rad hose is in the way, REMOVE IT.
The Pump only fits back on One way (master spline)So don't worry. You can use gasket goop or sealer on the timing cover piece.
Good luck
Ric