flyingtexan86
New User
I recently acquired a CAT D6 9U #9U9709 dozer with
hydraulic blade. Service meter shows 0630 hours which don’t
appear original.
She sat for over 7 years before I got her so I’ve been going
through her, replacing fluids, greasing, etc. After some TLC
with the points and carb, I got the pony motor running. Diesel
started up fairly easy with pony motor. Upon running the
diesel, I noticed water temp climbed to 190 after 10-15
minutes of running at mid throttle while testing clutches and
hydraulics. I lowered throttle to low idle expecting temp to cool
down, but temp seemed to just stay at 190.
Upon inspection, there was no water in crank case oil or air
bubbles in radiator (while running), so doesn’t seem to be a
cracked head.
Upon troubleshooting the coolant system, I realized the water
pump is not circulating coolant into the radiator. I performed a
through coolant flush of the radiator and engine block.
Everything seemed fine with no apparent blockage.
Belt has proper tension, fan turns freely and blows like a
hurricane through the radiator, coolant level was filled within
1” of radiator cap after flush, water pump doesn’t leak, has
very little play in the bearings and runs quiet, just doesn’t
pump coolant.
I’ve checked the thermostats and they are not seized, but I
haven’t tested them to see if they open at 165.
I haven’t completely ruled out thermostats, but the fact there
is zero coolant flowing from the pump into the radiator has me
looking at the water pump.
Before I go any further troubleshooting, has anyone ran into
this issue or have any insight?
hydraulic blade. Service meter shows 0630 hours which don’t
appear original.
She sat for over 7 years before I got her so I’ve been going
through her, replacing fluids, greasing, etc. After some TLC
with the points and carb, I got the pony motor running. Diesel
started up fairly easy with pony motor. Upon running the
diesel, I noticed water temp climbed to 190 after 10-15
minutes of running at mid throttle while testing clutches and
hydraulics. I lowered throttle to low idle expecting temp to cool
down, but temp seemed to just stay at 190.
Upon inspection, there was no water in crank case oil or air
bubbles in radiator (while running), so doesn’t seem to be a
cracked head.
Upon troubleshooting the coolant system, I realized the water
pump is not circulating coolant into the radiator. I performed a
through coolant flush of the radiator and engine block.
Everything seemed fine with no apparent blockage.
Belt has proper tension, fan turns freely and blows like a
hurricane through the radiator, coolant level was filled within
1” of radiator cap after flush, water pump doesn’t leak, has
very little play in the bearings and runs quiet, just doesn’t
pump coolant.
I’ve checked the thermostats and they are not seized, but I
haven’t tested them to see if they open at 165.
I haven’t completely ruled out thermostats, but the fact there
is zero coolant flowing from the pump into the radiator has me
looking at the water pump.
Before I go any further troubleshooting, has anyone ran into
this issue or have any insight?