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D4K travel speed drops to minimum under load

PB1

Member
Joined
Nov 9, 2019
Messages
7
Location
Catlettsburg, KY
I am working on a D4K, SN: MM00277, that equals shows both track speeds to what seems like minimum when pushing. If the operator goes to neutral and back to forward or reverse it immediately recovers. Pump charge pressures are well within spec. If I unplug the hydrostatic drive pressure sensor, (travel pressure sensor) it runs as it should, just with a code for the sensor being unhooked. The machine is not throwing any fault codes.

I attempted to check the crossover relief pressures, but my diesel laptop does not have a test available that will keep the tracks locked up. I’m assuming that the crossover reliefs are good because of proper operation when I unhook the travel pressure sensor.

Does anyone on here have any other ideas on what to check?
 
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