MH DDM-650 L-DC TDS Replacement Spare Parts

Product Introduction

This comprehensive MH DDM-650 L-DC TDS spare parts lineup includes direct-fit OEM replacement components for routine preventive maintenance, emergency breakdown repairs, and full top drive system overhauls. The collection covers gearbox clamping devices, sealing rings, roller bearings, hydraulic motors, control valves, swivel bearings, brake repair kits, and specialized fasteners—all designed to eliminate compatibility issues and streamline on-rig installation. Unlike generic aftermarket parts, each component is manufactured to the exact design specifications of the MH DDM-650 L-DC TDS, ensuring reliable performance under heavy drilling loads and adherence to global drilling equipment safety standards.

Functional Specifications

• Gearbox & Mechanical Components: High-load roller bearings (19828, 19925) reduce rotational friction; NBR Simmerring seals (21104) prevent lubricant leakage; wear rings (11356, 19968) protect rotating shafts; precision locking nuts and spring pins secure assemblies under heavy torque loads.
• Hydraulic & Control Components: Hydraulic orbit motors (19090) power pipe handling; proportional pressure relief valves (47305) regulate hydraulic flow; pneumatic/directional valves control system operation; filter elements (11227) keep hydraulic fluid clean; pressure gauges and transmitters monitor system performance.
• Swivel & Torque Wrench Parts: Tapered/cylindrical roller bearings support swivel rotation; specialized seal kits prevent fluid intrusion; flanged bronze bushings reduce wear; torque cylinder seal kits maintain clamping force.
• Sealing & Fastening Hardware: 70/90 Shore NBR O-rings and round packing rings eliminate hydraulic/fluid leaks; stainless steel spring pins and socket cap screws provide vibration-resistant fastening; marine-grade quick couplings enable secure hydraulic connections.

Structural Characteristics

All MH DDM-650 L-DC TDS spare parts feature rugged, drilling-specific construction for maximum durability: sealing components use oil-resistant NBR elastomers for extended service life; bearings use high-carbon steel for heavy-load capacity; bushings use oil-impregnated bronze for self-lubrication; fasteners use hot-dip galvanized steel for corrosion resistance; hydraulic components use marine-grade materials to withstand harsh drilling conditions. Parts are designed for tool-friendly field installation, with precise dimensional matching to OEM equipment for hassle-free replacement during critical drilling operations.

Applicable Operating Conditions

These spare parts are engineered to perform reliably in demanding onshore and offshore drilling environments, including:

• Full operation of MH DDM-650 L-DC Top Drive System (TDS) modules
• High-torque drilling operations with continuous gearbox and swivel rotation
• High-pressure hydraulic control systems (up to 350 bar working pressure)
• Offshore saltwater exposure, onshore abrasive mud, and extreme temperature fluctuations (-20°F to 250°F)
• Compliance with API 8C, ISO 13535, and DIN drilling equipment standards

Maintenance & Servicing Recommendations

1. Pre-Installation Verification: Cross-reference OEM part numbers against MH DDM-650 L-DC TDS technical manuals to confirm exact fitment; inspect parts for defects and clean mating surfaces to remove drilling mud, grease, and debris before assembly.
2. Seal & Bearing Replacement Schedule: Replace NBR seals, O-rings, and packing rings every 2,000 drilling hours; inspect roller bearings for wear every 1,500 hours and replace at the first sign of roughness or play to prevent gearbox damage.
3. Hydraulic System Care: Change hydraulic filter elements (11227) every 1,000 hours; inspect hoses and quick couplings for cracks or leaks monthly; calibrate pressure relief valves and transmitters quarterly to maintain proper hydraulic pressure.
4. Swivel & Torque Wrench Maintenance: Lubricate swivel bearings and bushings every 500 hours; replace swivel wear rings and shaft seals every 2,500 hours; inspect torque cylinder seal kits for leaks and replace as needed.
5. Fastener & Clip Inspection: Retorque locking nuts, bolts, and circlips to OEM torque specs after every major repair; replace worn spring pins and split pins to maintain assembly integrity.

We supply the following spare parts:

		TDS MH DDM-650 L-DC
#	Assignment	Name of the product and description	Part number	UM
1	DDM650L DC Gearbox Assembly MH 1712005	CLAMPING DEVICE 19955	19955	pcs
2		RUBBER CORD LOOP 3 RD+ -0,40 70 SHORE 19784	19784	pcs
3		SIMMERRING DIN 3760 NBR B2 W/S.S SPRING 21104	21104	pcs
4		SPACER RING 19692	19692	pcs
5		NUT TR.280X4 NR.HM 56 T 47545	47545	pcs
6		ROUND PACKING RING 19785	19785	pcs
7		ROLLER BEARING 19828	19828	pcs
8		RUBBER CORD 14115	14115	pcs
9		SPRING PIN 44114	44114	pcs
10		RUBBER CORD 19794	19794	pcs
11		RING 19937	19937	pcs
12		WEAR RING 11356	11356	pcs
13		ROUND PACKING RING 19787	19787	pcs
14		ROUND PACKING RING 19988	19988	pcs
15		ROUND PACKING RING 19985	19985	pcs
16		ROLLER BEARING 19925	19925	pcs
17		ROLLER BEARING 19926	19926	pcs
18		ROLLER BEARING 19830	19830	pcs
19		WEAR RING 19968	19968	pcs
20		SHAFT PACKING RING 19825	19825	pcs
21		EXTERNAL CIRCLIP 15877	15877	pcs
22		ROUND PACKING RING 19790	19790	pcs
23		BUFFERS AND BOLTS FOR COUPLING 20663	20663	pcs
24		ROLLER BEARING 19831	19831	pcs
25		SPRING PIN 44120	44120	pcs
26		WEAR RING 12352	12352	pcs
27		SPLIT PIN 46020	46020	pcs
28		BOLT 19953	19953	pcs
29		O-RING 20X04 SIMRIT 70 NBR 769 19961	19961	pcs
30		ROUND PACKING RING 26922	26922	pcs
31		EURO-PIL SEAL 19969	19969	pcs
32		PERMAGLIDE BUSHING 52265	52265	pcs
33		PERMAGLIDE BUSHING 52264	52264	pcs
34		SEALING RING 36803	36803	pcs
35		SEALING RING 25092	25092	pcs
36		INTERMED. RING 19970	19970	pcs
37		DISTANCE BUSHING 19971	19971	pcs
38		DISC 19972	19972	pcs
39		SEALING RING 25092	25092	pcs
40		O-RING 19990	19990	pcs
41		O-RING 25X3.5-NBR-90 SHORE A 46942	46942	pcs
42		CLAMPING PIN ISO 8752-10X50-ST 46941	46941	pcs
43		EUROPIL-SEAL. 19978	19978	pcs
44		SPRING PIN 44261	44261	pcs
45		SPRING PIN 44222	44222	pcs
46		ADJUSTING RING DIN 705-A35 46943	46943	pcs
47		MAGNETIC BAR COMPILATION 36802	36802	pcs
48	DDM650L DC motor Assembly MH 3511014	REPAIR KIT FOR AIRFLEX BRAKE 27831	27831	pcs
49		SOCKET CAP SCREW UNO 19693	19693	pcs
50		SPARK ARRESTOR ELEMENT 21983	21983	pcs
51		HOSE CLAMP 23422	23422	pcs
52		FILL-AIR HOSE PERF.PR.200MM-200MMX305METER 73549	73549	pcs
53		FILLER PLATE FOR GOOSENECK 9500012 P.67/MH1712028.3 19844	19844	pcs
54		ROUND PACKING RING/1712028.5 19846	19846	pcs
55	DDM650L DC Pipe Handler Sub Assembly MH 1717034	FLANGED BUSHING OIL BRONZE 19085	19085	pcs
56		HYDRAULIC ORBIT MOTOR 19090	19090	pcs
57		BEARING 19091	19091	pcs
58		INTERNAL CIRCLIP 19087	19087	pcs
59		LOCK NUT 10268	10268	pcs
60		LOCK NUT 10258	10258	pcs
61		LOCK NUT 10255	10255	pcs
62		LOCK WASHER 10240	10240	pcs
63		LOCK WASHER 10231	10231	pcs
64		LOCK WASHER 10228	10228	pcs
65		MALE STUD ELBOW 90 DEGR 10685	10685	pcs
66		SHACKLE BLUE PIN 2T 12265	12265	pcs
67		COUPLING LINK 11971	11971	pcs
68		COMPRESSION SPRING 19086	19086	pcs
69	DDM650L DC Hydraulic flow for control valves MH 1717064	MANIFOLD DOUBLE 19344	19344	pcs
70		AIR FILTER W/SINGLE YOKE ASSY. 19331	19331	pcs
71		LUBRICATION AGGREGAT 19336	19336	pcs
72		PRESSURE TRANSMITTER 50826	50826	pcs
73		PROPORTIONAL PRESS.RELIEF VALVE, 24VDC 47305	47305	pcs
74		VALVE PNEUMATIC 3/2 WAY 19341	19341	pcs
75		3/2 DIRECTIONAL VALVE EL/SPRING 11957	11957	pcs
76		FILTER ELEMENT BRANDED( for 11228 filter assembly) 11227	11227	pcs
77		PRESSURE GAUGE TYPE IM 12354	12354	pcs
78		MOTION CONTROL VALVE 19534	19534	pcs
79		4/2 DIR.VALVE EL.OPER.MARINE 48961	48961	pcs
80		INDUCTIVE NAMUR SENSOR W/15 MTR. CABLE 85408	85408	pcs
81		BUSHING 51254	51254	pcs
82		Seal kit for compensating cylinder BA0019082 11577	11577	pcs
83		THERMOMETRE 19460	19460	pcs
84		BUSHING 20988	20988	pcs
85		LUBE NIPPLE SS 13887	13887	pcs
86		COMPRESSION SPRING,STAINLESS STEEL 12086	12086	pcs
87		Lock pin (MH5202595) 16798	16798	pcs
88		Knob (MH5202596) 19312	19312	pcs
89		DUST CAP 28763	28763	pcs
90		DUST PLUG 28764	28764	pcs
91		HANSEN QUICK COUPLING 1/2” W/INW. THREAD 17973	17973	pcs
92		QUICK COUPLING SNAPTITE FM 11154	11154	pcs
93	DDM650L DC Swivel Assembly MH 1712003	SPACER RING FOR HYDR.SWIVEL/DDM650 H 33977	33977	pcs
94		WEAR RING FOR HYDR.SWIVEL/DDM650 H 33975	33975	pcs
95		TAPERED ROLLER BEARING 11451	11451	pcs
96		RUBBER CORD 12016	12016	pcs
97		SHAFT PACKING RING 12948	12948	pcs
98		WEAR RING 12956	12956	pcs
99		AXIAL CONE ROLLER BEARING EXPLORER 56123	56123	pcs
100		CYLINDER ROLLER BEARING 19832	19832	pcs
101		WEAR RING 19780	19780	pcs
102		SHAFT PACKING RING 11788	11788	pcs
103		SAFETY SCREW FOR THRUST NUT DDM 500 19632	19632	pcs
104		SHAFT PACKING RING 11448	11448	pcs
105		FILLER BUSHING FOR SPINDLE 9500012 P.35 19849	19849	pcs
106		O-RING FOR SPINDLE 9500012 P.38 19850	19850	pcs
107		SEAL RING FOR SPINDLE 9500012 P.36 19848	19848	pcs
108		RING FOR SPINDLE 9500012 POS. 37 19847	19847	pcs
109		RUBBER CORD 19794	19794	pcs
110		LAMINUM SUPPORT 19631	19631	pcs
111		BUSHING 20988	20988	pcs
112		WINDOW 19801	19801	pcs
113	DDM650L DC Swivel MH 1585033	PHED1000 POLYETHYLENE BEARING 37840	37840	pcs
114		RADIAL BEARING PTD 20570	20570	pcs
115		SEAL W/SPRING FOR SWIVEL 029OMM (139867+400015) 34942	34942	pcs
116	Torque Wrench assembly MH1720009	SEAL KIT FOR CYLINDER (BA0021175,21176 torque cylinder) 11578	11578	pcs
117		FLANGED BUSHING 11099	11099	pcs
118		GUIDE FUNNEL INSERT 8-8 1/2″ OD TJ FOR TORQUE WRENCH 5025124	5025124	pcs
119		GUIDE STUD M20X120 HOT DIP GALV. 17430	17430	pcs
120		HEX NUT 38017	38017	pcs
121		WASHER 38639	38639	pcs
122		Gooseneck WHWirth DDM-650L-DC	5603716	pcs
123		Hydraulic motor  WHWirth DDM-650L-DC	19089	pcs

On-Rig Fault Repair Cases

Case 1: DDM-650 Gearbox Seal Leakage

The MH DDM-650 L-DC TDS gearbox experienced severe lubricant leakage, caused by worn Simmerring seals (21104) and degraded round packing rings. The leak reduced gearbox lubrication and risked bearing failure. Replacing the seals and packing rings eliminated leakage and restored proper gearbox lubrication.

Case 2: Hydraulic Pipe Handler Malfunction

The TDS pipe handler failed to operate due to a faulty hydraulic orbit motor (19090) and worn flanged bronze bushings (19085). The malfunction halted pipe handling operations and delayed drilling. Installing a new motor and bushings restored full pipe handler functionality.

Case 3: Swivel Assembly Bearing Failure

The top drive swivel assembly developed excessive noise and rotation resistance, traced to a damaged tapered roller bearing (11451) and worn wear ring (33975). The issue restricted swivel movement and disrupted drilling. Replacing the bearing and wear ring resolved friction issues and restored smooth swivel rotation.

Frequently Asked Questions (FAQ)

Question	Answer
Are these parts compatible only with MH DDM-650 L-DC TDS?	Yes, all parts are precision engineered for exclusive use with the MH DDM-650 L-DC Top Drive System, with exact OEM part number matching for guaranteed fitment.
What is the service life of the NBR seals and O-rings?	70 Shore NBR seals and O-rings last 2,000-2,500 drilling hours under normal conditions; replace immediately if cracking, hardening, or leakage is detected.
Do these parts meet API drilling equipment standards?	Yes, all structural and hydraulic components comply with API 8C standards for top drive systems, ensuring safe and reliable performance in drilling operations.

Procurement Guidance & Closing Statement

For drilling rig maintenance teams, procurement managers, and service technicians responsible for keeping the MH DDM-650 L-DC Top Drive System operational in high-demand drilling environments, this spare parts catalog provides a fully OEM-compliant, quality-assured sourcing solution for all critical components. Backed by strict industry manufacturing standards and exact OEM part number matching, these components eliminate compatibility risks, streamline on-rig repair workflows, and provide a clear technical benchmark to resolve top drive faults quickly and effectively. Whether stocking for routine preventive maintenance, emergency hydraulic/gearbox repairs, or planned full system overhauls, these model-specific spare parts ensure adherence to API and global drilling safety standards, minimize costly unplanned rig downtime, and preserve the long-term service life of your MH DDM-650 L-DC TDS. Secure the precision bearings, seals, hydraulic components, and fasteners your top drive needs to maintain reliable, efficient, and uninterrupted drilling operations.