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Farmall & IHC Tractors Discussion Board |
Re: Checking cam gear
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Posted by Bob M on May 23, 2001 at 10:46:56 from (192.232.119.194):
In Reply to: Checking cam gear posted by SMTA on May 23, 2001 at 07:13:20:
You have to remove the hyd pump to check the cam gear. Fortunately pump removal is relatively straightforward: 1 - Crank the motor by hand until the distributor rotor is pointing toward the #1 plug tower and the timing mark on the crank pulley indicates TDC. Put a mark on the distributor indicating the #1 position. 2 - Remove the bolts that hold the hose manifold to the bottom of the hyd pump. Then swing the manifold aside (leave hoses connected). Figure on losing at least a couple quarts of hyd fluid when you unbolt the manifold so be prepared... 3 - Remove the distributor cap and the primary wire from the distributor. 4 - Remove the bolts that hold the hyd pump to the back of the timing gear plate. 5 - Carefully pull the pump/distributor assembly away from the timing gear plate. You'll now be able to see the top of the cam gear inside the timing case. If you can move it back and forth, or it has any play whatosever under hand pressure, there's a problem with the hub or with a loose/missing camshaft nut. It will require further disassembly to correct. Reassembly is the reverse of the above. Just make sure the distributor rotor points to the mark you made in step #1 when the pump is back in place (and DON'T turn the crank while the distributor is out unless you want to retime the distributor). Also make sure the O-ring seals are on the hose manifold and the surfaces are clean before bolting it back togehter Getting into the timing case requires removal of the entire front bolster and radiator assembly. You'll need an OH hoist or a bucket loader to handle these parts - altogether they weigh around 1/2 ton. You'll also need a 2-1/2" socket to get the nut off that holds the crank pulley. For photos of the process replacing the cam gear on my Super M last fall, punch below...
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