Highlight:
Hyundai HCE seal kit
, genuine tractor oil seal
, aftermarket pump seal R110-7A
1. Quick Details of seal 31N6-40950:
| Part NO. |
31N6-40950 |
| Machine |
excavator |
| Size |
OEM |
| Material |
Oil seal,Seal ring |
| Oil seal type |
SERVICE KIT,TSTEERING |
2. 31N6-40950 parts on group :
| NO. |
PART NO. |
PRAT NAME |
QTY |
| 1 |
31N2-40021 |
TURNING JOINT |
1 |
| 2 |
31N2-40022 |
TURNING JOINT |
1 |
| 3 |
31N2-40911 |
HUBE |
1 |
| 4 |
31N2-40921 |
SHAFT |
1 |
| 5 |
31N2-40930 |
COVER |
1 |
| 6 |
31E3-0035 |
SPACER |
1 |
| 7 |
31E3-0036 |
SHIM |
1 |
| 8 |
31E3-0037 |
SHIM |
1 |
| 9 |
31N6-40990 |
SEAL-SLIPPER |
6 |
| 10 |
31Q6-40960 |
SEAL-SLIPPER |
6 |
| 11 |
CO0071A |
O-RING |
1 |
| 12 |
CO0067B |
O-RING |
1 |
| 13 |
CO0219B |
O-RING |
1 |
| 14 |
Y320-100011 |
RING-WEAR |
2 |
| 15 |
S601-090004 |
RING-RETAINING |
1 |
| 16 |
P220-430204 |
PLUG-HEX |
4 |
| 17 |
S017-120352 |
BOLT-HEX |
4 |
| 18 |
S411-120002 |
WASHER-SPRING |
4 |
| 19 |
31N6-40950 |
SEAL KIT |
1 |
| 20 |
31N6-40951 |
SEAL KIT |
1 |
3. 31N6-40950 picture:
4. Service part number :
| PART NO. |
PART NO. |
Part NO. |
| 707-35-52670 |
707-51-45640 |
707-99-75600 |
| 707-51-45640 |
707-51-11640 |
707-51-80640 |
| 707-35-52690 |
707-35-91100 |
707-98-36600 |
| 707-51-55630 |
707-51-11690 |
707-51-11640 |
| 707-51-55640 |
707-51-12630 |
707-98-25910 |
| 707-51-60640 |
707-51-90640 |
707-44-85150 |
| 707-51-60650 |
707-51-90650 |
707-44-90070 |
| 707-51-65630 |
707-51-95630 |
707-44-85150 |
| 707-99-77120 |
707-51-95640 |
707-44-90070 |
| 707-99-77130 |
707-51-60650 |
707-44-90080 |
| 707-51-65640 |
707-51-65630 |
707-44-90180 |
| 707-35-52780 |
707-51-60650 |
707-44-10911 |
| 707-51-70630 |
707-44-90180 |
707-44-11080 |
| 707-51-70650 |
707-44-90150 |
707-51-20250 |
| 707-99-77240 |
707-98-60121 |
707-35-52700 |
5. FAQ
Q: How do I install this cylinder seal kit correctly?
A: Start by fully disassembling the cylinder, removing all old seals, and cleaning every part thoroughly with solvent. Even small debris can scratch surfaces and damage new seals. Next, inspect the cylinder bore, piston, rod, and seal grooves for scratches, scoring, or corrosion, as even minor damage will cause leaks. Lay out the new seals to identify each one, then lightly lubricate them with clean, compatible hydraulic oil before installation. Install the seals in the correct order: fit the piston seals and wear bands first, then the rod seals and wiper seals. When reassembling, use a conical assembly sleeve to protect the seals as you insert the piston into the bore. After assembly, perform a pressure test to check for leaks before putting the cylinder back into service.
Q: What common mistakes lead to early seal failure?
A: Skipping the deep cleaning step allows contamination to abrade and damage new seals. Twisting or overstretching seals during installation creates hidden damage that causes leaks immediately. Installing seals backwards, especially rod seals and piston seals, means they won’t hold pressure properly. Using the wrong lubricant can chemically attack the seals and cause premature failure. Forgetting to use an assembly sleeve can tear the seal lips during piston insertion.
Q: How long will a properly installed cylinder seal kit last?
A: If the hydraulic fluid is clean, installation is done correctly, and there’s no underlying mechanical damage, a high-quality kit can last between 5,000 and 10,000 operating hours. Contaminated oil, excessive side loads, or rod misalignment will significantly shorten this lifespan.
Q: Is it okay to reuse any old seals from the original kit?
A: It is strongly advised against reusing any old seals. Even if they appear undamaged, they lose elasticity over time and develop permanent deformation and hidden wear from being installed once. Always use every new seal in the kit for a reliable rebuild.
6. Exhibition and Wearhous
Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More
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