Nabtesco KYB MAG-18VP MAG-26VP Travel Motor Replacement | Excavator Final Drive

Model Number	MAG-85VP-1200-4, MAG-180VP-6000, MAG-18VP-350F

Product Description

Genlu Hydraulic proudly introduces our MAG Series (covering MAG-18VP, MAG-26VP, MAG-85VP, and MAG-180VP) high-efficiency excavator final drive assemblies (hydraulic travel motor with planetary gearbox). This premier lineup is engineered in strict accordance with the core mechanical standards of Nabtesco and KYB, widely applied across global mainstream brands of mini, midi, and medium tracked excavator dual-speed travel networks. Our specialized manufacturing line precisely provides interchangeable options for high-demand field codes: MAG-18VP-350F, MAG-26VP, MAG-85VP-1200-4, and the heavy-duty tonnage MAG-180VP-6000. Serving as the rugged “propulsion legs” for tracked undercarriages, Genlu unequivocally guarantees 100% Drop-in Interchangeability in crawler frame mounting pilots, sprocket bolt circles/pitch diameters, and the exact orientation of main fluid ports (including Ports A/B, speed shift lines, and case drains) relative to original units. Backed by our uncompromising 100% Simulation Load Testing, every single final drive assembly is verified across full system pressures to test volumetric efficiency, mechanical mechanical spring brake release thresholds, and planetary gear backlash, ensuring powerful tractive effort under harsh muddy slope climbing.

Technical Specifications

Product Series: MAG Series Excavator Dedicated Variable Displacement Axial Piston Travel Motor & Gearbox
Core Configuration Codes: MAG-18VP-350F, MAG-26VP, MAG-85VP-1200-4, MAG-180VP-6000
Target Machine Tonnage: Optimized for 1.5-ton up to 20-ton mini and medium-sized tracked excavators
Rated Continuous Pressure: 31.5 MPa – 34.3 MPa (315 bar – 343 bar)
Peak Shock Pressure: 38 MPa (380 bar)
Displacement Shift Pattern: VP series dual-speed automatic shifting managed via an integrated internal pilot control spool
Mechanical Parking Brake: Internal wet multi-disc spring-applied, hydraulic-released structural parking brake
Gearbox Architecture: Compact heavy-duty integrated 2-stage or 3-stage planetary reduction gear set

Key Technical Advantages:

Monoblock Highly Integrated Architecture: Seamlessly houses the high-pressure piston motor, multi-disc wet brakes, auto-shift control valves, and heavy-torque planetary reduction gears inside a robust housing. This immense power density matches the ultra-confined installation pockets of crawler lower frames.
Induction-Hardened High-Load Planetary Gearing: The internal sun gears, planetary gears, and ring gears are forged from specialized premium alloy steel, treated through vacuum high-frequency induction hardening. Gear precision scales above ISO Grade 6, effortlessly absorbing massive shock spikes during instant directional reverses.
Micron-Matched Piston Assembly & Balanced Valve Plate: Piston-to-bore clearances are precision-honed to micron levels. Paired with a bimetallic vacuum-sintered floating valve plate engineered with silencing notches, volumetric efficiency remains above 96% under a continuous 34.3 MPa load, preventing tracking drift.
Heavy-Duty External Floating Mechanical Seals: The output hub interface is protected via high-wear dual-cone floating seals. This provides an absolute barrier that blocks sand, abrasives, mud, and salt-laden water from entering the gear cavity while securing the lubrication oil matrix against environmental leakage.

Application Areas:

Mini Tracked Excavators: Left/right travel drive assemblies for 1.5-ton to 3.5-ton mini-diggers (typically powered by MAG-18VP / MAG-26VP).
Midi Excavators & Specialty Crawler Cranes: Under-carriage drives for 6-ton to 8-ton medium crawlers (typically utilizing MAG-85VP), rotary drilling rigs, and tracked agricultural harvesters.

Expert Maintenance Tips:

Enforce Rigid Planetary Gearbox Oil Schedules: The final drive comprises two distinct oil chambers: the motor section uses system hydraulic fluid, while the planetary gearbox uses specialized heavy gear oil (e.g., SAE 90 or 85W-140). The break-in oil must be drained and replaced within the first 50 hours of operation, followed by regular renewals every 500-1000 hours to eliminate metallic debris and prevent gear chipping.
Never Restrict or Block the Case Drain Port (Port Dr): Piston motor internal bypass leakage must return freely to the hydraulic reservoir via a dedicated case drain line. If this line is inadvertently plugged or tied into a high-pressure return circuit during install, internal case backpressure spikes instantly, blowing out the high-pressure shaft seal or bursting the aluminum motor casing within minutes.
Periodically Wash Out the Travel Motor Enclosure Bay: Excavators routinely work in heavy mud and muck, causing the travel motor rear cover pocket to pack tightly with solid mud and rock debris. Over time, these packed solids can chafe the high/low-speed external lines or exert heavy stress on case connectors. Always wash the final drive bay out using a high-pressure water gun during routine preventative maintenance.

Related Models：

M2X70CAB-10A-01/260
M5X180CHB-10A-1KD/285-149
M5X180CHB-10A-4AA/330
M5X180CHB-10A-35B/285-F
KAYABA – KYB
MAG-10-90-1 (20450-52002)
MAG-16N-120 (20450-52423)
MAG-12V-120E
MAG-16N-220-1, 20450-52436
MAG-16P-120-1,
MAG-16V-140, 20450-52501
MAG-16V-140-1
MAG-16V-140-2 – 20450-52513
MAG-16V-180-2 (20450-52519)
MAG-16V-180-2 (B0240-16006)
MAG-16V-190E-2, B0240-18027
MAG-18V-190E-2 (B0240-18027)
MAG-16VP-180-2 (B0240-16006)
MAG-18V-150E-2 (B0240-18044)
MAG-18V-200-1 (20450-52466)
MAG-18V-210-1 (20450-52473)
MAG-18V-230E-1, B0240-18048
MAG-18V-230-2 (20450-52496)
MAG-18V-230E-3, B0240-18091
MAG-18V-230F-3 (B0240-18093)
MAG 18V-240-2
MAG-18V-250 (20450-52474)
MAG-18V-250-2 (20450-52497)
MAG-18V-260-1 (20450-52521)
MAG-18V-280E-1 (B0240-18013)
MAG-18V-280E-4 (B0240-18030)
MAG-18V-280E-4 (B0240-18039)
MAG-18V-290E-1
MAG-18V-320E
MAG-18V-320E-3 (B0240-18046)
MAG-18V-350F-2
MAG-18VP-190E-2, B0240-18056
MAG-18VP-220
MAG-18VP-220-3
MAG-18VP-220F-1, B0240-18059
MAG-18VP-220F-2 (B0240-18060)
MAG-18VP-230
MAG-18VP-230F-1 (B0240-18063)
mag-18vp-230f-2 (B0240-18061)
MAG-18VP-230F-5 B0240-18089
MAG-18VP-230F-7 (B0240-18098)
MAG-18VP-250
Mag-18VP-270E-1 (B0240-18034)
MAG-18VP-290
MAG-18VP-350
MAG-18VP-350F-2
MAG-18VP-350F-3 – B0240-18070
MAG-18VP-350F-5
MAG-18VP-350F-6
MAG-18VP-350F-9 (B0240-18086)
MAG-26P-320-1, 20450-53099
MAG-26V
MAG-26V-11 1T215002090
MAG-26V-280-3
MAG-26V-320-1 (20450-53063)
MAG-26V-380-1 (B0240-26010)
MAG-26V-380F-1 (B0240-26015)
MAG-26V-400
MAG-26VP
MAG-26VP-310-2 (20450-53092)
MAG-26VP-320-3
MAG-33P-500-8,
MAG-33V-450-1 (20450-53411)
MAG-33V-500E-1 (B0240-33030)
MAG-33V-510-1 (20450-53473)
MAG-33V-550E-2 (B0240-33017)
MAG-33V-550E-4
MAG-33V-550F-5
MAG-33V-550F-6 (B0240-33001)
MAG-33VP
MAG-33VP-370E-1 (B0240-33014)
MAG-33VP-460 (20450-53438)
MAG-33VP-500-3 (20450-53453)
MAG-33VP-500-5,
MAG-33VP-550
MAG-33VP-550-2 (B0240-33007)
MAG-33VP-650
MAG-33VP-650F
MAG-33VP-650F-2 (B0240-33069)
MAG-33VP-650F-3 (B0240-33071)
MAG-33VP-650F-12(B0240-33083)
MAG-33VP-650F-16(B0240-33086)
MAG-33VP-650F-17 (B0240-33087)
MAG-37NV-450-4 (20450-53403)
MAG-44V-9-800
MAG-44VP-TR8 (B0443-09058)
MAG-50VP-16
MAG-50VP-1100F-K1 (B0240-5009)
MAG-63VP-770 (20450-54387)
MAG-63VP-770-2,
MAG-63P-940 (20450-54333)
MAG-85NP-730-1 (20450-54309)
MAG-85VP-1200-6,
MAG-85VP-1600-2 B0240-85014
MAG-85VP-1800
MAG-85VP-2000-2
MAG-85VP-2000E-2 (B0240-85013)
MAG-85VP-2400E-6
MAG-85VP-2400E-8 (b0240-85018)
MAG-150VP-2300-4,
MAG-85NP-730-1, (20450-54309)
MAG-85VP-1000-5,
MAG-85VP-1200-4,
MAG-170VP-2400-1,
MAG-170VP-2700-1,
MAG-170VP-3400F-4 (B0240-93032)
MAG-170VP-3600E-2 (B0240-93006)
MAG-170VP-3600E-4 (B0240-93015)
MAG-170VP-3600E-6 (B0240-93025)
MAG-170VP-3600F-2 (B0240-96006)
MAG-170VP-3600-4,
MAG-170VP-3800
MAG-170VP-3800G-S1 (B0240-93041)
MAG-170VP-3800G-S4 (B0240-93054)
MAG-170VP-3800G-K1 (B0240-93045)
MAG-170VP-3800G-K5 (B0240-93052)
MAG-170VP-3800G-K9 (B0240-93084)
MAG-170VP-3800G-K10 (B0240-93085)
MAG-180VP-6000
MAG-230VP-3000,
MAG-230VP-3000-3,
MAG-230VP-4000-1
MSG-27P-9-2 (20450-63210)
MAG-27P-10E-23 (B0250-27076)
MSG-27P-10E-23 (B0250-27076)
MSG-27P-10E-11 (B0250-27030)
MSG-27P-16E-14 (B0250-27044)
MSG-27P-16E-25 (B0250-27077)
MSG-27P-23E-4-T220
MSG-27P-23E-6 (B0250-27042)
MSG-44P-21-19 (B0250-44019)
MSG-27P-23E-12 (B0250-27072)
MSG-28P-16E-26 (B0250-27078)
MSG-85P-17TR, (B0250-85003)
MSG-85P-17TR (B0250-85004)
MSF-27P-16 – B0440-27063
MSF-85P (B0440-85018) 1T852070137
MSF-85P-7 (B0440-85019) 1T852070138
MSF-170VP-4
MSF-170VP-5 (20460-51456)
PC-100-19-4D-0922A
PC-100L-16-5K-1317A
PC-300-20-6M-1404A
PCL-25-8-1S2-8791A
PCL-25-9-7S2-8727A
PCL-100-21-1S2-8605A
PCL-120-18B-1S3-8962A
PCL-200-20B-7FG3-9127A
PCR-1B-05A-P-8289A
PCR-1B-05A-P-8290A
PCR-2B-10A-8689A
PCR-2B-10A-FP-8584A
PCR-3B-12A-FP-8632A
PCR-5B-30A-FGB-9537A
PCR-5B-30A-FGP-9407A
PCR-5B-30A-FGP-9478A
PH-100-24-686E
PH-100M-25-R-1462B
PH-100N-25-0965A
PH-100N-37-0969A
PH-200N-37-1019A
PH-300N-53-1190A
PH-300N-53-1382A
PH-300-53-1145A
ph-300-58-840C
PVD-08-9P-5G-5041A
PVD-0B-12P-5G-5210A
PVD-0B-16L3PS-5G-4451F
PVD-0B-16L3PS-5G-4451G
PVD-0B-19L3PS-8G-4069F
PVD-0B-20P-6G-4624B
PVD-0B-21L3PS-6G3-4694F
PVD-0B-24P-6G3-4913B
PVD-0B-24P-8G3-4837B
PVD-0B-24P-8G3-4837C
PVD-0B-24P-8G3-5236B
PVD-00B-11-3-4732A
PVD-00B-14P-3-4984A
PVD-00B-15P-5AG3-54960A
PVD-00B-14P-5G3-4978A
PVD-00B-14P-5G3-4978A
PVD-00B-15P-5G3-4982A
PVD-00B-16P-5G3-5158a
PVD-1B-20L3DPS-8G-4098A
PVD-1B-23L3S-5S-4124F
PVD-1B-24CP-8AG5-5137A
PVD-1B-25BP-8AG5-4760A
PVD-1B-26P-8G3-5755A
PVD-1B-27L3PS-9G-4357F
PVD-1B-28L3DPS-10G
PVD-1B-28P-4575A
PVD-1B-28P-8G3-5161A
PVD-1B-29BP-11G5-452
PVD-1B-29L3DPS-10G-4791F
PVD-1B-30L3DPS-9G-4364F
PVD-1B-31BP-8AG5-4901B
PVD-1B-34P-11G5-4665B
PVD-2B-20B-P-8875A
PVD-2B-36L3DS-5S-4126G
PVD-2B-31P-11AG-3053F
PVD-2B-40P-16G5-4191B
PVD-2B-41BP-16G5-5184B
PVD-2B-42L3DPS-12G-4218F
PVD-2B-44BP-16G5-4713F
PVD-2B-44P-12G-4713H
PVD-2B-45P-18G6A-4891F
PVD-2B-50BP-21G5-4597H
PVD-2B-50P-16G6-4928G
PVD-3B-54P-14G8-4405F
PVD-3B-56P-18G5-4191A
PVD-3B-56P-21G-4626F
PVD-3B-56P-21G-4626H
PVD-3B-56L-3DPS-21G-4120F
PVD-3B-60L-5P-9G-0235A

Company Profile

Frequently Asked Questions

1.What ls our Main Products?

1.Hydraulic pump
2.Hydraulic valve
3.Hydraulic motor
4.Hydraulic cylinder
5.Hydraulic parts

2. What about the MOQ?

MOQ: 1pcs— we support sample and small quantity orders.

3.What are your advantages?

Adhere to quality first.
Support customization, ODM & OEM service.
1-year warranty and complete after-sales support.
Safe and fast shipping worldwide.
24-hour online service for your inquiries.

4.Are you a manufacturer? What’s your delivery time?

Yes, we are a manufacturer with our own factory.

Common models are in stock, and orders are usually shipped within 1–3 days.

5.Which payment methods are accepted?

We accept T/T, L/C, PayPal, VISA, Western Union, Apple Pay, Google Pay, Afterpay (Clearpay), Klarna, and Trade Assurance.

For full orders: 30% deposit, balance before shipment.

For small/sample orders: full payment in advance.

6.How will you deliver my goods?

We offer flexible shipping options: DHL, UPS, FedEx, TNT, EMS, as well as air or sea freight.

All deliveries ensure door-to-door fast and safe service.

7.How do you inspect and guarantee your products?

All products are tested before shipment to ensure perfect working condition.

We offer a 12-month warranty — if a product fails due to quality issues, we provide free spare parts or repair support.

8.What about after-sales service?

If you encounter any problem during use, please contact your sales manager or our support team at any time.

We will respond quickly and help solve the issue efficiently.

9.What are your main applications?

Hydraulic systems
Agricultural machinery
Construction machinery
Automobile industry
Local distributors and maintenance centers

10.Can I get a discount for bulk orders?

Yes. We offer competitive wholesale prices and try our best to give benefits to long-term partners.

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