Common electrical failures, hydraulic leaks, and cooling system clogs are the most frequent new holland ls170 problems owners encounter during regular machine operation. These issues typically arise from high operating hours or inconsistent maintenance schedules rather than inherent design flaws. While the machine remains a reliable workhorse, its performance depends heavily on the condition of the electrical sensors and the cleanliness of the radiator fins. Because these units are now older, most failures stem from worn seals or corroded wiring harnesses that require immediate attention to prevent further damage to the hydrostatic system.
Troubleshooting your New Holland problems
This machine often shows specific signs of wear as it nears its service limits. The following table summarizes the most frequent maintenance concerns reported by operators of this skid steer loader.
| Problem Area | Common Symptom | Typical Cause |
|---|---|---|
| Electrical system | Engine won’t start | Corroded wiring harness |
| Hydraulic system | Weak lift power | Worn pump seals |
| Cooling system | Engine overheats | Clogged radiator core |
| Fuel system | Rough engine idle | Clogged fuel filter |
| Drive system | Machine pulls sideways | Misaligned control linkage |
If the engine cranks but fails to fire, check the fuel solenoid first. A faulty solenoid mimics a clogged filter, but it will cost you a full day of downtime if you misdiagnose it.
For hydraulic issues, measure the pressure at the auxiliary ports.
Operators often ignore the radiator fins until the engine hits the red zone. Clean them every 50 hours of operation to prevent permanent block damage. If the machine pulls to one side, inspect the drive motor case drain filter before adjusting the linkage. A clogged filter creates backpressure that forces the machine to veer, wasting fuel and risking internal motor failure.
Electrical system failures
Electrical gremlins often stem from the aging wiring harnesses that run throughout the chassis. If the engine fails to crank, check the battery terminals for corrosion and the main starter relay for signs of melting or moisture entry. A common mistake is replacing the starter motor before checking the ground cables, which often causes unnecessary expense and downtime. If the machine has been stored outdoors, moisture frequently causes shorts in the fuse block located behind the operator’s seat.
- Check the fuse panel for blown circuits if the auxiliary hydraulics stop working suddenly.
- Inspect the ignition switch for loose connections if the dash lights flicker during operation.
- Clean all ground points on the engine block to ensure a strong electrical path.
When you notice a “no start” condition, contact a qualified technician to inspect the battery and electrical system for potential failure.
Hydraulic system performance
Hydraulic power loss usually happens because of internal bypass or seal degradation within the lift cylinders. You might notice the loader arms drifting downward under load or the bucket failing to curl with full force. Using the wrong hydraulic fluid weight can also lead to sluggish performance, especially in cold weather environments where thinner oil is required.
- Monitor the hydraulic oil level daily to prevent pump cavitation and internal scoring.
- Replace the hydraulic filter every 500 hours to keep debris from damaging the control valves.
- Check for external weeping at the cylinder glands, which indicates a need for seal replacement.
Always release the residual pressure in the auxiliary lines before attempting to disconnect any hydraulic couplers to avoid oil spray. If the oil appears milky, water has contaminated the system, and you must perform a full fluid flush.
Engine cooling and overheating
Overheating is a significant risk if the radiator fins become packed with debris from dusty job sites. The LS170 uses a rear-mounted cooling package, which is prone to collecting straw, dirt, and leaves during daily work. If the temperature gauge climbs into the red zone, stop the engine immediately to prevent head gasket failure or permanent cylinder damage. A clean radiator is essential for long-term engine health, so use compressed air to blow out the core from the inside out.
- Inspect the fan belt for cracks or improper tension, which causes the fan to spin too slowly.
- Check the coolant mixture ratio to ensure it matches the manufacturer’s recommendation for your climate.
- Clean the engine compartment of flammable debris that can trap heat near the exhaust manifold.
If the machine runs hot even with a clean radiator, the thermostat may be stuck in the closed position. Replacing the thermostat is a straightforward job, but you must drain the coolant safely into a container first to avoid environmental contamination.
Fuel system maintenance
Fuel delivery issues often manifest as a loss of engine power or an inability to reach maximum RPM under load. The fuel filter is the first place to check if the engine sputters or dies while you’re working. If you find water in the fuel bowl, drain it immediately, as moisture causes rust inside the injection pump and injectors. Always use a high-quality fuel additive if you operate in cold conditions to prevent fuel gelling in the lines.
- Change the primary and secondary fuel filters every 250 hours of operation.
- Bleed the air from the fuel system after every filter change to ensure a smooth start.
- Inspect the fuel lines for dry rot or cracking that could allow air to enter the system.
If the engine surges while idling, the fuel lift pump might be failing or struggling to pull fuel from the tank. Ensure your fuel cap vent is clear, as a vacuum lock in the tank will mimic a failed fuel pump.
Additional maintenance concerns
Neglecting this leads to premature sprocket tooth wear, which costs roughly three times more to replace than a simple tensioning adjustment.
Maintain tire pressure within two PSI of the manufacturer’s recommendation. If the loader consistently pulls to the left or right on flat ground, check the pressure before inspecting the hydrostatic motors. Uneven inflation creates internal resistance that strains the hydraulic system, eventually causing seal failure.
Worn bushings force operators to overcompensate, which leads to jerky, imprecise movements during delicate material handling tasks.
Choosing the right repair path
Deciding whether to fix a problem yourself depends on your access to specialized tools and your comfort level with heavy equipment. If you possess a basic set of wrenches, a multimeter, and the official service documentation, you can handle most electrical and routine maintenance tasks yourself.
However, if the issue involves the hydrostatic transmission or internal engine timing, you should seek a professional technician. These systems require precise calibration that, if done incorrectly, can lead to catastrophic failure of the drive motors. A common mistake is attempting to bypass these internal adjustments to save money, which often results in significant secondary damage.
If the machine won’t start or shows a warning light for hydraulic pressure, stop immediately and call a pro. If the issue is limited to visible leaks or worn belts, you’re likely safe to proceed. Picking the right path is a trade-off between the cost of professional labor and the time you’re willing to invest. You can combine minor repairs like filter changes with professional diagnostics to keep costs low while ensuring the machine remains safe.
Frequently asked questions
How do I stop my machine from pulling to one side?
The machine pulls to one side because of uneven tire pressure or misaligned steering control linkages. Check the air pressure in all four tires first, as a difference of even 5 psi will cause the loader to drift. If the pressures are identical, the steering rods require manual adjustment to ensure both pumps deliver equal flow to the drive motors at the same handle position.
Why does my hydraulic lift feel weak?
Hydraulic lift feels weak because the system pressure is low or the hydraulic filter is restricted. Check the fluid level first, then inspect the hydraulic filter for debris that might be blocking the flow. If the fluid is clean and the level is correct, the internal seals in the lift cylinders may be bypassing oil, which requires a professional pressure test to confirm.
Is it safe to operate with a flickering dash light?
It isn’t safe to operate with a flickering dash light because it indicates a loose electrical connection or a failing alternator. A sudden loss of power while operating can lead to an unexpected engine stall, which is dangerous if you’re carrying a heavy load. Inspect the battery connections and the alternator output to identify the source of the electrical instability before returning to work.
How often should I clean the radiator?
You should clean the radiator daily if you work in dry, dusty, or debris-heavy environments. A layer of dust on the fins acts as an insulator and prevents the cooling fan from pulling enough air through to lower the engine temperature. Use low-pressure compressed air and blow from the engine side outward to clear the core effectively without bending the delicate aluminum fins.
What happens if I use the wrong hydraulic oil?
Using the wrong hydraulic oil leads to sluggish performance, increased wear on pump components, and potential failure of the hydrostatic drive system. The viscosity of the oil must match the manufacturer’s specification to ensure that the pumps create the correct pressure at operating temperature. If you have already added the wrong oil, drain the system immediately and replace it with the correct grade to prevent long-term damage.
Does the age of the machine matter for part availability?
The age of the machine matters because certain electronic sensors and specific trim pieces are no longer manufactured. While engine and hydraulic components remain widely available through aftermarket suppliers, you may need to source used parts from salvage yards for specific body panels or discontinued electrical control modules. Always verify the serial number before ordering parts to ensure compatibility with your specific model year.
Conclusion
Start by checking the engine oil and hydraulic fluid levels before you attempt to start the machine each day. If you hear grinding noises or see persistent blue smoke, stop the machine immediately and contact a qualified service technician to prevent further damage.
