DANFOSS OMR 100 REPAIR

Danfoss OMR 100 repair: one seal kit, many motors, and how to pick the right one

A small orbital motor starts leaking at the shaft, and the first question is always “which kit?” Here’s a surprise that saves time and money: for this motor, the kit depends on the design series, not the size. The same kit number appears on motors from 100 up to 315. So the real job is working out which version you have and whether seals are the real problem. Advance Hydraulic Works works with hydraulic pump and motor repair and supply from Delhi NCR, and this is how we’d go through it with you.

Danfoss OMR 100 seal kit: which one?

A European shop lists the 151-0412 with a standard high-pressure dust seal, an HNBR high-pressure shaft seal and seal kit 151-1286. The 151-0712 shows design number 6, a 25 mm straight shaft with an A8 × 7 × 32 key, and the same kit, 151-1286.

The same kit number appears for other motors. It’s listed for the OMR 315, the OMR 200, the OMP 100 and the OMP 125. So the Danfoss OMR 100 seal kit is really a series kit. Match your design number and shaft seal type, not just the size.

A distributor lists the contents of 151-1286 as a 35 × 27.5 × 2.2 mm dust seal and a 39 × 28.6 × 4.9 mm shaft seal, along with O-rings and washers, in a pack weighing about 0.06 kg. A different kit, 11188319, appears in listings for the newer White generation, so don’t mix them.

Two versions, one difference

Here’s a detail that matters for diagnosis. The 151-0412 is listed as a motor with no drain port, and the 151-0712 as one with a case drain. Both are design 6 and take the same kit.

Without a drain port, the shaft seal sits close to the motor’s low-pressure side, so return-line pressure and internal wear both show up as shaft leaks. With a case drain, a rising drain flow tells you about internal wear. Know which version you have before you decide.

What a seal kit can and can’t fix

A kit covers the soft parts. It fixes:

• A leak at the shaft where the motor still runs at the right speed.
• Weeping at the flange joints.

It won’t fix:

• Slow output under load.
• Hot oil from internal leakage.
• A scored shaft or worn bearings.
• A worn gerotor set or valve parts.

If the motor is weak as well as leaking, the seals aren’t the root cause.

Danfoss OMR 100 repair service: what a proper job includes

Whoever does the work, a good Danfoss OMR 100 repair service should:

1. Identify the motor’s design, version and shaft from the nameplate.
2. Strip it and inspect the gerotor set, valve parts, drive shaft and bearings.
3. Measure wear and tell you plainly which parts are worn.
4. Replace worn parts and every seal, using the right kit.
5. Rebuild in clean conditions.
6. Test speed, leakage and pressure before it leaves.
7. Give you the test results.

Ask any shop, including Advance Hydraulic Works, to confirm these steps before you accept a quote.

The method: version, symptoms, test, decide

Version. Find out whether yours has a drain port, and note the design number.

Symptoms. Is it only leaking, or also slow, hot or noisy?

Test. Run the motor at a known flow and measure its speed.

Decide. Healthy speed means a kit may be enough. Low speed means internal wear.

A worked example

At 40 litres per minute, a healthy motor of 99.8 cm³ turns at about 40,000 ÷ 99.8, roughly 401 rpm. Say yours turns at 345 rpm under the same flow. At that speed it passes 345 × 99.8 = 34,431 cc a minute, about 34.4 litres per minute, so around 5.6 litres per minute leaks internally. At 100 bar, that’s about 100 × 5.6 ÷ 600, roughly 0.9 kW going into the oil. That’s about 86% volumetric efficiency, and a new kit won’t touch it. If the motor had turned at 398 rpm with only a shaft leak, the kit would be the right answer. This is illustrative arithmetic, and acceptable limits depend on the data for your exact motor.

Implementation steps

1. Photograph the motor, its nameplate and the leak before removal.
2. Write down the full part number, the design number and whether it has a drain port.
3. Check return-line pressure and rule out a blocked return.
4. Test speed at a known flow, and check drain flow if the motor has a drain.
5. Send snap shots and readings to Advance Hydraulic Works and ask for an evaluation.
6. If a package is sufficient, ask the vendor to match it in your layout in writing.
7. If not, ask for a restore quote with components, trying out and turnaround.
8. After restore, refit the motor, run it unloaded first and watch for leaks and heat.

The normal mistakes are becoming a package onto a worn motor, ignoring return-line strain and combining up kits for unique generations.

FAQs

Which Danfoss OMR one hundred seal kit do I want?

layout 6 automobiles along with the 151-0412 and 151-0712, the kit is 151-1286. Check your design number first, because other series take different kits.

What’s in a Danfoss OMR 100 seal kit?

A dust seal, a shaft seal, O-rings and washers. Check the kit’s parts list against your motor.

When is a seal kit not enough for Danfoss OMR 100 repair?

When the motor is slow, hot or weak as well as leaking. That points to internal wear that seals can’t fix.

What does a Danfoss OMR one hundred restore carrier encompass?

Identifying the motor, stripping and inspecting it, changing worn elements and seals, rebuilding it cleanly and checking out it. Ask for the check outcomes.

Can Advance Hydraulic Works help with a seal kit or repair?

Send the photographs, nameplate and signs and symptoms to Advance Hydraulic Works and ask about the proper package or a restore evaluation before you devote.

Your next step

Photograph the motor, note whether it has a drain port and send everything to Advance Hydraulic Works. You’ll know whether it’s a seal kit or a bigger job before you spend anything.