NOV Varco 4S Top Drive (TDS-4S) Spare Parts

Detailed Product Introduction

This NOV Varco 4S Top Drive spare parts collection covers all mission-critical wear and replacement components for the TDS-4S system, with cross-referenced OEM part numbers for exact drop-in fit. The catalog includes seal kits for leveling/accumulator cylinders, torque wrench components, hydraulic hoses (500 bar rated), elevator linings, mud tube assemblies, bearing sets, brake calipers, control valves, pressure switches, and specialized installation/removal mandrels. Parts are segmented by core top drive systems, auxiliary drilling equipment, and wear-prone modules to streamline sourcing, addressing high-failure areas such as sealing systems, hydraulic actuation, brake mechanisms, and mud handling components.

All components are machined to original NOV Varco dimensional specifications, eliminating compatibility issues and reducing repair turnaround time for both minor on-site fixes and full top drive refurbishments, ensuring seamless integration with existing TDS-4S hardware and supporting drilling rig equipment.

Functional Performance & Value Highlights

• High-Pressure & High-Torque Reliability: Components rated for up to 7500 psi hydraulic pressure and 750-tonne elevator loads maintain stable performance under extreme drilling torque and pressure.
• Leak-Proof Sealing Performance: Premium OEM seal kits and face seals eliminate hydraulic/mud fluid leaks, preserving system pressure and preventing contamination-related failures.
• Extended Wear Life: Forged steel bearings, wear-resistant elevator linings, and heat-treated components extend replacement intervals by 60%, cutting long-term maintenance costs.
• Rapid Repair Compatibility: Pre-assembled repair kits and OEM-matched parts reduce troubleshooting and installation time by 70%, minimizing costly drilling downtime.

Structural & Engineering Features

• Exact NOV Varco OEM Drop-In Fit: All components machined to TDS-4S original specifications, requiring no custom modifications for field installation.
• API Standard Compliance: Parts built to meet API 7K (drilling equipment) and API 16D (blowout prevention) standards, ensuring safety and reliability in heavy-duty drilling operations.
• Modular Repair Kit Design: Pre-packaged cylinder, pump, and valve repair kits simplify part sourcing and on-site repairs for field maintenance teams.
• Shock & Vibration Resistance: Reinforced structural components and rubber bumpers absorb rig vibration, preventing premature fatigue and component failure.

Applicable Operating Conditions

• These NOV Varco 4S Top Drive spare parts are built for demanding onshore and offshore drilling environments where reliable top drive performance is critical, including:
• NOV Varco TDS-4S 4S Top Drive routine maintenance, repairs, and full overhauls
• 12-P-160 mud pump fluid end and crankshaft component replacement
• 1320-UDBE drawworks brake and bearing maintenance
• Hydra Tong T4063 drill tong hydraulic and mechanical repairs
• High-torque, high-pressure rotary drilling operations
• Harsh wellsites with extreme vibration, mud exposure, and temperature fluctuations

Professional Maintenance & Troubleshooting Recommendations

1. Cylinder & Seal Inspection: Check leveling cylinder, accumulator, and brake seals for wear or leaks every 1,000 drilling hours; replace worn seal kits immediately to prevent pressure loss.
2. Brake System Maintenance: Inspect drawworks brake calipers, shoes, and pins quarterly; lubricate moving parts and replace worn components to ensure reliable braking performance.
3. Mud Tube & Hose Checks: Inspect high-pressure mud tubes and hydraulic hoses for cracks or abrasion every 500 hours; replace damaged assemblies to avoid catastrophic fluid leaks.
4. Bearing & Alignment Calibration: Verify top drive bearing wear and alignment during every overhaul; use OEM mandrels for proper seal and bushing installation.
5. Scheduled Overhaul Intervals: Conduct a full TDS-4S top drive overhaul (seals, cylinders, bearings, valves) every 20,000 drilling hours to prevent mid-operation failure.

We supply the following spare parts:

pos.	PN	item
1	85678	Leveling Cylinder Seal Kit for TDS-4S Top Actuator
2	1000149	Repair kit for manual regulator
3	50004100-3	Set of black linings for 350 t links shank diameter 3 1/2″
4	50004100-2	White lining kit for 500 t links shank diameter 4 1/2″
5	50004100-1	Set of green linings for 750 t links shank diameter 5 3/4″
6	50004133-12	Accumulator Cylinder Precharge Pressure Test Kit Varco 50004133
7	20012091	Multi-Ram block, 5″-7″, NXT complete with seals for NXT Shaffer blowout preventer
8	20011987	6-5/8″ NOV/20011987 Tubing Dies Assembly with Seals for NXT Shaffer BOP
9	56625-1.5-03	Power cable 3×1.5 mm2
10	56626-07	Power cable 7×1 mm2
11	703305-19G	Set of shims
12	20017079+20	Diaphragm repair kit
13	9930026	Triplex pump repair kit for air defense control station
14	9910001	Set of repair regulator with manual control for air defense control station
15	0000385	Repair kit for cylinder accumulator 15 gallon for air defense control station
16	9933240	Repair kit for pump
17	9931510	Repair kit for pump
18	94764-SK	Counterweight cylinder repair kit
19	P611000038	Mud tube assembly kit 3″ SVP assembly
20	P611000038-500	Face seal kit 3″
21	P611000038-501	Set of service sealing rings 3″
22	30182002-502	Key set
23	P611000038-503	Floating carrier seal kit
24	P611000038-504	Lower Nut Kit
25	P611000038-505	Top Nut Kit
26	36020	Seal kit
27	30155689-2	Flow Switch 0.25 GPM for Top Actuator TDS-4S
28	30155689-3	Flow Switch 1.2 GPM for Top Actuator TDS-4S
29	71847	Rod pusher for top actuator TDS-4S
30	109600-11	Auxiliary fluid circuit for TDS-4S top power drive
31	1292182	Oil scraper for mud pump 12-P-160
32	1292266	Wear-resistant disc for mud pump 12-P-160
33	6908040	Steel wafer ring for mud pump 12-P-160
34	81788+30	Torque wrench for Hydra Tong T4063 automatic drill tong
35	143267+71	Hydraulic hose 3/8″, 500 bar for Hydra Tong T4063 automatic drill tong
36	143273+71	Hydraulic hose 3/8″, 500 bar for Hydra Tong T4063 automatic drill tong
37	143280+71	Hydraulic hose 3/8″, 500 bar for Hydra Tong T4063 automatic drill tong
38	143281+71	Hydraulic hose 3/8″, 500 bar for Hydra Tong T4063 automatic drill tong
39	143282+71	Hydraulic hose 3/8″, 500 bar for Hydra Tong T4063 automatic drill tong
40	143283+71	Hydraulic hose 3/8″, 500 bar for Hydra Tong T4063 automatic drill tong
41	143284+71	Hydraulic hose 3/8″, 500 bar for Hydra Tong T4063 automatic drill tong
42	7815673	Pin cotter pin with ring for drawworks 1320-UDBE
43	7000208-30	Hex screw for drawworks 1320-UDBE
44	2111777	Pneumatic pump for drawworks 1320-UDBE
45	05466650НР	Cylinder sleeve ⌀6 1/2″ for mud pump 12-P-160
46	2110490	Bearing for drawworks 1320-UDBE
47	2110288	Spring for drawworks 1320-UDBE
48	20026217+20	Top seal for Shaffer 18-3/4-5/10/15Kpsi shear ram
49	20026206+20	Bottom seal CVX, for Shaffer 18-3/4-5/10/15Kpsi shear ram
50	2110001	Emergency brake cylinder for drawworks 1320-UDBE
51	10852863-001	Sealing element for universal preventer 18-3/4″
52	7401803	Double acting valve SPM
53	81768	Proportional valve for Hydra Tong T4063 automatic drilling tong
54	98826	Hydraulic clamp block for Hydra Tong T4063 automatic drill tong
55	3688AP06	Air filter for cooling system of electric motors
56	30123288	Retaining ring for TDS-4S upper power drive
57	123284	Pressure pipe nut for TDS-4S top actuator
58	30123289	Pressure pipe 7500 psi for top actuator TDS-4S
59	30123563	Stuffing box for top power drive TDS-4S
60	123585	Top separator ring for top power drive TDS-4S
61	30123286	Middle separator ring for top power drive TDS-4S
62	123287	Lower separator ring for upper power drive TDS-4S
63	31948/M2	Sleeve M2 for safety valve Titan Class C
64	32524	Valve seat insert for safety valve Titan Class C
65	33003-01	Piston Rod Subassembly for Titan Class C Relief Valve
66	32501-2	Lower piston seal for safety valve Titan Class C
67	702640-24-31	Sealing ring in the gap between the sleeve and the housing for the Titan Class C safety valve
68	702640-23-01	Stem bushing outer seal for Titan Class C safety valve
69	1292240	Injection box complete with studs for mud pump 12P-160
70	50000650Y	Hydraulic elevator BX4-75
71	80375-2	Hose assembly TW press. (H1) for TDS-4S Top Actuator
72	34000-02-01	Safety valve Titan Class C (flanged connections, without return connections)
73	1292350	Stop for mud pump 12-P-160
74	XD110001206	Anti-wear plate for hydraulic tong
75	XD110001207	Anti-wear plate for hydraulic tong
76	85195	Cylinder
77	203121	High pressure hose pos.20
78	1292362	Hydraulic suction boxfor mud pump 12-P-160
79	91762	Tube assembly for torque wrench PH85 top drive TDS-4S
80	91761	Tube assembly for torque wrench PH85 top drive TDS-4S
81	80426	Linear length transducer W/2M
82	31022	Hydraulic cylinder 80/50 for HYDRATONG automatic drilling tong
83	142392	Hydraulic motor
84	2110668	Service brake caliper lever pos. 2 for Drawworks 1320-UDBE
85	2110044	Brake shoe pin pos. 3 for Drawworks 1320-UDBE
86	2110484	Emergency brake caliper lever pos. 2 for Drawworks 1320-UDBE
87	641101902	Case
88	1480247	Anti-vibration hinge 4″
89	96507	Cylinder of clamping of lateral jaws of automatic drilling key
90	55908-8-8	Quick coupling FD45-4 for elevator BX-4-75
91	99461	Cylinder of a clamp of lateral jaws of an automatic drilling key 120/80
92	93124	Hydraulic cylinder 100/50
93	0000096	Balloon accumulator for air defense control station, 207 bar, 15 gal
94	1502062SS	Piston 6 1/2″ for mud pump 12-P-160
95	MB64-15	Piston 6 1/2″ for mud pump 12-P-160
96	19206-80-30	Working wheel 12″ for Mission Magnum pump
97	19123-01-30A	Pump body for Mission Magnum pump
98	19121-70-30	Working wheel 11″ for Mission Magnum pump
99	19121-90-30	Working wheel 13″ for Mission Magnum pump
100	1480065	Vibration motor
101	1480228	Locking ring
102	1490015	Hinge pin
103	472492	Oil seal
104	BRK-D270	Rubber seal kit
105	BWS-D270	Rear wall seal
106	60506	The coil of the discharge line of the pump No. 1
107	665002003	Suction elbow
108	M291295396	Chain lubrication pump
109	M291292844	External lubrication system
110	7802327	Coupling
111	1292225	Cross with filter assembly for mud pump 12-P-160
112	150854	Sliding plate
113	33091	Roller bearing
114	27479	Roller bearing
115	94324	Pulley
116	92993	Rubber bumper
117	152540	Hydraulic swivel
118	26775	Swivel ring
119	33082	Roller bearing
120	152553	Rubber buffer
121	33089	Spring
122	148594	Bearing
123	37461	V-ring
124	150848	Spring
125	35437	Ball bearing
126	10197	Retaining ring
127	12474	V-ring
128	29386	Roller bearing
129	91971	Bushing flange
130	54569	Linear Length Transducer w/AVM
131	447-B-357	Intermediate tank vent valve
132	55909-8-8	Hydraulic quick coupling, male thread FD-45 #8
133	979798-7-C	Manometer coupling Mini-mess M16x2 – 1/4″ BSP, o-ring, stainless steel
134	50004133-11	Cylinder seal kit
135	XD110001547	Slide plate for hydraulic tong
136	XD110001194	Slide plate for hydraulic tong
137	XD110001125	Slide plate for hydraulic tong
138	XD110001115	Slide plate for hydraulic tong
139	XD110000943	Slide plate for hydraulic tong
140	662013009	Shaft sleeve
141	700030711	Hex head bolt 1/2″x2″
142	123582	Mounting plate
143	76649	Fan suction gasket
144	76643	Fan shroud
145	72396	Duct plug
146	140966-86-20-20	Loop power cable
147	30174375-400-50-220	Engine
148	30170945-86-20-20	Cable control cable
149	122705-86-1-2	Loop hydraulic cable
150	30157486	Moisture separator mounting frame
151	107590	Air supply hose 10×25 ft.
152	107588-20	Hose clamp
153	30174380	Mounting plate
154	30156360-L	Terminal box
155	30174660	Terminal box
156	2110298	Mandrel for removing the wear sleeve
157	2110263	Mandrel for installation of anti-wear seal
158	2111575	Drift for installation of the bushing of the rotary lever of the brake caliper
159	2111576	Drift for installation of the bushing of the rotary lever of the brake caliper
160	2111573	Drift for installation of the bushing of the rotary lever of the brake caliper
161	2110493	Mandrel for installation of seal
162	2110496	Mandrel for removal of the bushing
163	2110659	Hinge pin retainer plate
164	2110497	Gasket ring
165	128996	Tilt Strut Assy pos 200 for TDS-4S Top Actuator
166	90793-Q	Drive gear for SVP electric motor TDS-4S
167	2112458	Disc brake assembly for drawworks 1320-UDBE
168	123285	Top separator ring
169	200662-1	Hinged jaw assembly, 8 1/2″-17″
170	51603-16-S	Lock pin
171	77034	Lifting cylinder fork pipe clamp PH85
172	115341	Adapter protective plate
173	50010-20-C5D	Hexagon bolt with cotter hole
174	7817600-458	O-ring
175	642183-А	Gear Coupling Housing
176	620967-1	Gear coupling
177	YS-4757	Seal for drawworks 1320-UDBE
178	7600042	Washer
179	622868-3	Adjusting gasket
180	622868-2	Adjusting gasket
181	622868-1	Adjusting gasket
182	622868	Adjusting gasket
183	618947	Outer clip
184	612372	Internal clip
185	626360-А	Bearing
186	612361-А	Roller holder
187	ZS-7080	Bearing
188	612738-А	Roller bearing
189	619319-А	Switch Clutch Ring
190	612747	Tube seal
191	641013	Outer clip
192	641019	Load ring
193	641157	Internal clip
194	641440	Adjusting gasket
195	645856	Load ring
196	645895	Sleeve
197	7805052	Grease dispenser
198	6803020	Sleeve
199	13381	Bolt with hexagon head М10х30
200	37591	Bolt М10х140
201	32969	Locking screw M6x10
202	95714	Ball bearing
203	25606	Bolt М5х25
204	25614	Bolt М6х20
205	16401-6	Dryer
206	19122-01-30A	Pump casing
207	030639	Sealing ring
208	040989	Sealing ring
209	717400	Sealing ring
210	062229	Bearing
211	062230	Seal
212	030617	Sealing ring
213	062276	Seal
214	030583	Sealing ring
215	040999	Retaining ring
216	717315	Lower sealing ring
217	717316	Top sealing ring
218	062220	Seal
219	062238	Bearing
220	030609	Sealing ring
221	1292292	Irrigation system sleeve bushings, 1-1/2″x37″, assemblyfor mud pump 12-P-160
222	1282036	Irrigation hose bushings, 1″x30″, assemblyfor mud pump 12-P-160
223	94764	Counterweight cylinder
224	51404-18-S	Split pin
225	50520-C	Nut
226	30171396	Finger
227	30171395	Finger
228	1502062XT	Piston 6 1/2″ for mud pump 12-P-160
229	1283191	Gasket
230	1292064	Gasket
231	1292079	Gasket
232	1292095	Gasket
233	1292096	Gasket
234	1292097	Gasket
235	1292227	Gasket
236	1275158	Gasket
237	1284106	Gasket
238	1292076	Gasket
239	2302019	Coupling
240	59044P08A060	High pressure hose assembly
241	59026P08A060	High pressure hose assembly
242	59026P08A012	High pressure hose assembly
243	59024P230008	High pressure hose assembly
244	59024P230021	High pressure hose assembly
245	59044P230020	High pressure hose assembly
246	58892P290069	High pressure hose assembly
247	58592P230105	High pressure hose assembly
248	58572P230105	High pressure hose assembly
249	150026	Mandrel
250	150028	Blade
251	150030	Spring
252	150027	Blade holder
253	23230	Screw
254	149267	Blade setting tool
255	167200	Locking plate 95x15x1.5
256	147054	Bolt М8х20 A4
257	159131	Locking plate 78x15x1.5
258	185908	Stop plate
259	165074	Stop plate
260	147051	Shaft 80х96
261	147236	Shaft 60×112
262	185841	Spherical bearing CB80
263	147237	Sleeve 60/75х100
264	147053	Rod rod 120/CH90x137.5(87.5) M53x3
265	XD110002117	Stabilizer bolt
266	34259	Locknut М36
267	26652	Nut М36 HDG
268	26565	Washer М36 VG
269	XD110001555	Stabilizer plug
270	95702	Disc spring
271	XD110001688	Anti-wear plate
272	XD110001694	Stove
273	25143	Bolt М12х30 mm
274	99707	Bushing AMPCO 18
275	27084	Bolt М10х40 mm
276	25141	Bolt М12х20 mm
277	XD110001691	Stop plate
278	XD110001286	Retaining bolt
279	XD110001692	Retaining bolt
280	XD110001721	Stop plate
281	XD110001722	Cylinder bolt
282	XD110001689	Stop plate
283	19006	Bolt M10x16 mm
284	25673	Bolt М16х70 mm
285	XD110001784	Clamp
286	215807	Cylinder cover lower cylinder, 120/KM60x135, M125x2
287	30182002-26	Face seal pin
288	50208-B	Nut 1/2″-13
289	17469489-001	Sealing element for universal preventer 18-3/4″
290	83542	Pressure regulator
291	87234	Pressure regulator assembly
292	87204	Shuttle valve
293	1292903	Crankshaft assembly with gear for mud pump 12-Р-160

Field NOV Varco 4S Top Drive Fault Repair Cases

Case 1: TDS-4S Leveling Cylinder Leakage

A NOV Varco 4S top drive experienced erratic leveling due to a leaking actuator cylinder. Installing the OEM Leveling Cylinder Seal Kit (PN 85678) eliminated hydraulic leaks, restoring precise top drive leveling and resuming drilling operations.

Case 2: 1320-UDBE Drawworks Brake Failure

A rig’s drawworks emergency brake failed to engage due to a worn cylinder and faulty pins. Replacing the Emergency Brake Cylinder (PN 2110001) and Brake Shoe Pin (PN 2110044) fixed brake functionality, complying with rig safety protocols.

Case 3: TDS-4S Mud Tube Seal Failure

The top drive’s 3” mud tube assembly developed mud leaks from worn face seals. Fitting the OEM Face Seal Kit (PN P611000038-500) resolved the leakage, preventing mud contamination of internal top drive components.

Frequently Asked Questions (FAQ)

Question	Answer
Are these parts compatible only with NOV Varco TDS-4S 4S top drives?	Yes, all core parts are custom-designed for the NOV Varco 4S (TDS-4S) Top Drive, with select components compatible with 12-P-160 mud pumps, 1320-UDBE drawworks, and T4063 drill tongs.
Do these parts meet API drilling safety standards?	Absolutely, all components comply with API 7K and API 16D industry standards for drilling rig equipment, ensuring safe and reliable operation in regulated oilfield environments.
Can I use these kits for on-site top drive repairs?	Yes, all repair kits and replacement parts are designed for quick field installation, making them ideal for emergency on-site repairs and routine preventive maintenance.

Procurement Guidance & Call to Action

For drilling rig maintenance supervisors, wellsite operations managers, and oilfield procurement teams relying on the NOV Varco 4S (TDS-4S) Top Drive and supporting rig equipment, this parts list is the definitive resource to minimize downtime, uphold API safety standards, and source guaranteed OEM-compatible components. Avoid the risks of substandard generic parts, costly top drive failures, and delayed drilling operations — this catalog provides a standardized procurement benchmark and technical repair reference for all critical TDS-4S components.

Secure these high-quality, API-compliant NOV Varco 4S Top Drive spare parts to execute fast, reliable on-site repairs, maintain consistent top drive torque and performance, and protect your valuable drilling equipment from premature wear. Each component is built to withstand the rigors of 24/7 drilling operations, making this the trusted choice for keeping your NOV Varco 4S Top Drive operating at peak efficiency and safety.