Sometimes our service receives cases that surprise even the most experienced mechanics.
This time, a K3V112 hydraulic pump from a Volvo FC210 machine came to the workshop, and the story of this repair shows that imagination knows no bounds – especially when someone tries to repair a pump... with silicone.
Mechanic or tiler? The verification surprised everyone
The report concerned an oil leak. After initial inspections, it turned out that someone had tried to seal the pump with silicone – which may have temporarily stopped the leak, but absolutely did not solve the problem. The pump was sent to us for full verification and repair.
Dismantling the K3V112 pump – step by step
During disassembly, it turned out that:
- some components were in good condition – e.g., the low-pressure pump and the sliding surface of the pistons,
- many components qualified for immediate replacement – including pistons with play, a separator, cylinders, and a base with a heavily worn tilting plate.
A typical problem with this design turned out to be the worn pressure valve seat and wear of the control piston seals – this is exactly the leak that someone tried to "save" with silicone.
How to recognize that the pump had been repaired before?
An interesting element of the verification was the comparison of springs – irregular spring impressions indicated previous, unprofessional interference. Such details are significant in assessing the pump's operational history.
Time is money – the customer chooses a new solution
Due to the urgency of the repair, the customer decided to purchase a new pump from our stock. The damaged unit was left as a trade-in, and we took care of:
- replacing all connections and nipples,
- installing the new pump on the test stand,
- conducting a thorough test and making any necessary adjustments.
Tests on the test bench – we leave nothing to chance
Every pump, before reaching the customer, undergoes full tests on the test stand. We check:
- the low-pressure pump power supply,
- pressures P1 and P2,
- leaks,
- the operation of the EPR regulator controlled by a coil.
In this case, there was no need for adjustments – the new pump was ready for operation immediately after installation in the machine.
Summary – trust the professionals, not silicone
The K3V112 pump from the Volvo FC210 was replaced with a new, fully tested unit. This story reminds us that half-measures cannot replace professional diagnosis and regeneration. If you notice a leak in a hydraulic pump – do not risk further damage, just hand it over to specialists. We provide free verification of pumps on the same day they arrive.
See how the tests went and what mistakes the previous service technician made:
