Quality KOBELCO SK135SRLC-2 SK140SRLC SK140SR Excavator Final Drive Nabtesco GM21VA-A Original Travel Motor YY15V00015F1 YY53D00006F1 YY53D00007F1 YY15V00015F1 factory

KOBELCO SK135SRLC-2 SK140SRLC SK140SR Excavator Final Drive Nabtesco GM21VA-A Original Travel Motor YY15V00015F1 YY53D00006F1 YY53D00007F1 YY15V00015F1

Name: KOBELCO SK135SRLC-2 SK140SRLC SK140SR Excavator Final Drive Nabtesco GM21VA-A Original Travel Motor YY15V00015F1 YY53D00006F1 YY53D00007F1 YY15V00015F1
Brand: BELPARTS MACHINERY LIMITED
SKU: SK135SRLC-2 SK140SRLC SK140SR
Price: 475.00 USD
Availability: InStock

Place of Origin:Japan

Brand Name:Belparts

Certification:ISO9001 / 2006/42/EC

Model Number:SK135SRLC-2 SK140SRLC SK140SR

Minimum Order Quantity:1 PCS

Price:Negotiation

Payment Terms:L/C,D/A,D/P,T/T,alibab TRADE ASSURANCE,WEST UNION,PAYPAL

Supply Ability:100 PCS / Months

Product Details

Highlight:

KOBELCO excavator final drive motor

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Nabtesco GM21VA-A travel motor

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SK140SR excavator travel motor

Model: SK135SRLC-2 SK140SRLC SK140SR

Part Number: YY15V00015F1 YY53D00006F1 YY53D00007F1 YY15V00015F1

Type: GM21VA-A

OEM: Nabtesco / Teijin

Appliion: Excavator

Part Name: Final Drive / Travel Motor With Gearbox

Quality: Original Genuine

Condition: New

Shipment: DHL FEDEX TNT EMS UPS / Ses / Air

Warranty: 12 Month

Product Description

Pos.	Part No	Qty	Parts name
.	YY15V00015F1	1	MOTOR
1	YY15V00015S001	1	HUB
2	YY15V00015S002	1	PIN
3	NA	1	NOT SERVICED
4	YY15V00015S004	1	SUN GEAR
5	NA	3	NOT SERVICED
6	NA	3	NOT SERVICED
7	NA	1	NOT SERVICED
8	YY15V00015S008	1	SUN GEAR
9	NA	3	NOT SERVICED
10	NA	3	NOT SERVICED
11	NA	6	NOT SERVICED
12	NA	6	NOT SERVICED
13	YN15V00037S013	1	PLATE
14	YY15V00015S014	1	COVER
15	YY15V00015S015	1	COUPLING
16	NA	3	NOT SERVICED
17	NA	3	NOT SERVICED
22	YY15V00015S022	2	WASHER
23	YY15V00015S023	1	SHIM
24	YY15V00015S024	2	BALL BEARING,0.1" ID
27	NA	3	NOT SERVICED
28	NA	3	NOT SERVICED
29	NA	2	NOT SERVICED
30	2441U995S121	3	PLUG
31	ZD12P01800	3	O‑RING
32	YY15V00015S032	1	O‑RING
33	ZD12P00700	2	O‑RING,1.6mm Thk x 6.8mm ID,90 Duro
35	ZS23C10035	12	SCREW,Hex Socket Head,M10 x 35mm
36	ZR16X02200	1	RING
102	YY15V00015S102	1	SHAFT
103	YY15V00015S103	1	PLATE
104	NA	1	NOT SERVICED
105	NA	9	NOT SERVICED
106	NA	9	NOT SERVICED
107	YY15V00015S107	1	PLATE
108	YY15V00015S108	1	BALL
109	YY15V00015S109	1	PLATE
110	2441U532S110	2	WASHER
112	YY15V00015S112	1	PISTON
113	LF15V00002S113	10	SPRING
114	YY15V00015S114	1	SPRING
115	YY15V00015S115	3	PLATE
116	YY15V00015S116	4	PLATE
132	YY15V00015S132	1	OIL SEAL
135	LF15V00002S141	1	O‑RING
139	YY15V00015S139	1	O‑RING
145	2441U815S145	1	SNAP RING
149	YY15V00015S149	1	BALL BEARING,0.1" ID
150	YY15V00015S150	1	BALL BEARING,0.1" ID
151	YY15V00015S151	3	ROLLER
161	NA	1	NOT SERVICED
162	NA	1	NOT SERVICED
167	YY15V00015S167	2	PIVOT
171	YW15V00005S171	2	PIN
185	YY15V00015S185	1	SPRING
301	NA	1	NOT SERVICED
341	2441U815S141	1	PIN
354	PY15V00006S154	5	PLUG
357	2441U995S121	1	PLUG
359	ZD12P01800	1	O‑RING
363	YY15V00015S363	1	PISTON
366	YY15V00015S366	1	SPRING
376	NA	1	NOT SERVICED
377	2441U1065S379	1	HYDRAULIC MOTOR
399	PH15V00009S299	1	LABEL
K.	YY15V00015R400	1	REPAIR KIT
K.	YY15V00015R410	1	REPAIR KIT
K.	YY15V00015R420	1	REPAIR KIT
K.	YY15V00015R430	1	REPAIR KIT
K.	YY15V00015R440	1	REPAIR KIT
K.	YY15V00015R450	1	REPAIR KIT
K.	YY15V00015R460	1	REPAIR KIT
K.	YY15V00015R470	1	REPAIR KIT

Original Nabtesco GM21VA Integrated Final Drive Travel Motor Assembly with Gearbox YY15V00015F1 YY53D00006F1 YY53D00007F1 for Kobelco SK135SRLC‑2 SK140SRLC SK140SR Excavator

1. OEM Part Number & Machine Compatibility

Original travel motor model: Nabtesco GM21‑VA two‑speed integrated final drive (hydraulic travel motor + 2‑stage planetary reduction gearbox)
Kobelco OEM interchange part numbers: YY15V00015F1, YY53D00006F1, YY53D00007F1
Fully compatible excavator models: Kobelco SK135SRLC‑2, SK140SRLC, SK140SR
All listed part numbers are supersession iterative codes for the same complete assembly; unified mounting flange pattern, sprocket hub interface, hydraulic A/B feed & drain ports and internal hydraulic calibration. Genuine original unit supports direct bolt‑on replacement, no modification to track frame or hydraulic pipelines required.

2. Core Technical Specifications

Structure type: Two‑speed variable displacement hydraulic travel motor (Stage 1: Low Speed High Torque / Stage 2: High‑Speed Travel) + two‑stage planetary reduction gear reducer
Dual motor displacement: 45 / 76 cm³/rev
Total gear reduction ratio: 54

Second‑Stage High‑Speed Working Parameters

Rated working pressure: 32.0 MPa
Maximum relief pressure: 34.8 MPa
Rated operating speed: 2 450 rpm
Rated input power: 43.5 kW
Max output climbing torque: 20 600 N·m
Dual travel speed range: 28‑52 rpm, perfectly matched to factory hydraulic system for 13‑14 ton Kobelco short‑tail swing excavator platform
Mounting PCD, sprocket fit dimension and oil port layout strictly follow Kobelco OEM drawing specifications
Motor and gearbox housing made of high‑strength ductile iron; internal pistons, valve plate, planetary gears, carrier and heavy‑duty bearings adopt quenched wear‑resistant alloy steel for urban construction and rough‑site operations.

3. Internal Structure & Functional Introduction

Dual‑displacement travel motor offers two working modes: low‑speed high‑torque mode for slope climbing, muddy terrain and heavy digging; high‑speed mode for fast flat‑ground machine relocation.
Built‑in multi‑disc spring‑applied hydraulic‑release mechanical parking brake, prevents track sliding on inclined ground when travel control is released.
Two‑stage compact planetary gear set amplifies hydraulic torque to drive track sprocket, delivering stable continuous power output under heavy‑load conditions.
Integrated anti‑cavitation valve and built‑in shock relief valve absorb hydraulic pressure spikes during compound movements, protecting internal core components from impact damage.
Compact integrated layout is optimized for short‑tail swing undercarriage of SK135SRLC‑2 / SK140SRLC / SK140SR models.

4. Product Advantages

Genuine original Nabtesco complete assembly, 1:1 OEM dimension, plug‑and‑play installation without cutting or reworking hoses, track frame or mounting brackets.
Every original final drive passes full factory hydraulic bench test before shipment: two‑speed shift test, pressure stability test, internal leakage test and brake holding torque verification.
Full overhaul spare parts are available: floating seal, piston shoe assemblies, swash plate, valve plate, planetary gear sets, carrier, bearings and full seal repair kits for component‑level maintenance.
Multiple cross‑reference OEM numbers cover three short‑tail excavator models, simplify order processing, stock classification and inventory management for dealers and repair workshops.
Standard 12‑month full warranty for original unit, performance consistent with factory‑fitted travel motor assembly.

5. Packaging & Global Delivery Details

Oil ports and output spline shaft coated with anti‑rust grease and fitted with dust‑proof protective plugs.
Complete final drive wrapped with moisture‑proof plastic film and secured in export‑grade solid wooden crate to avoid collision and damp corrosion during sea or air long‑haul transit.
In‑stock original units can be dispatched within 3‑5 working days after order confirmation.
Multiple shipping options available: international air express, sea LCL bulk shipment, overland truck transport for global construction machinery markets.

6. FAQ

Q: Are YY15V00015F1, YY53D00006F1, YY53D00007F1 mutually interchangeable?

A: Yes, these are iterative supersession part numbers for Nabtesco GM21VA final drive assembly, fully cross‑replaceable for Kobelco SK135SRLC‑2, SK140SRLC, SK140SR.
Q: Does this original travel motor fit directly on all listed Kobelco short‑tail excavators?

A: Yes, unified OEM mounting dimensions and factory‑calibrated hydraulic parameters support direct bolt‑on installation without extra adjustment or modification.
Q: What is the relation between GM21VA and these Kobelco OEM part numbers?

A: GM21VA is Nabtesco original travel motor model code; YY15V00015F1, YY53D00006F1, YY53D00007F1 are Kobelco‑assigned OEM part numbers for this full final‑drive assembly.
Q: Are separate overhaul spare parts available for GM21VA final drive?

A: Matching full seal kits, piston shoe assemblies, valve plates, swash plates, planetary gear carriers and floating seal spare parts are available for partial overhaul and single‑component replacement work.