1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com
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Disconnect power and land car on the buffers (zero system pressure) before installation. Do not save and reuse parts.
291510 KIT FOR UC1 / UC1A / UC2 / UC2A VALVES
Quantity Part No. Description Quantity Part No. Description
3 2057A0 Seal Ring (BPS / Down / Check piston) 3 210600 Seal Ring (Adjuster; down leveling, BPS)
2 210000 Seal Ring (BPS / Down closure sleeve) 29 210800 Seal Ring (1/4-28 Button head screw)
1 2372LC Square C.S. Seal Ring (Face Seal) 1 210900 Seal Cup (Down adjuster)
5 210200 Seal Ring (BPS / Down / Check piston rod) 1 2110LC Square C.S. Seal Ring (Relief block bore)
1 210300 Seal Ring (Restrictor closure) 9 227000 Adjuster Seal (Teflon ring)
1 210370 Seal Ring (Check Closure with groove) 2 28098A Piston Ring & Expander (BPS / Down)
3 210400 Seal Ring (Flanges, Pump, Tank & Jack) 2 2107LC Square C.S. Seal Ring (Face Seal)
1 2385LC Square C.S. Seal Ring (Face Seal)
17 2105LC Square C.S. Seal Ring (Face Seal) 3 210700 Seal Ring (LS adjuster, Up/Dn strainer)
6 210500 Seal Ring (Seal plug, Relief push rod) 8 263900 Seal Ring (10-32 button head screw)
Disconnect power and land car on the buffers (zero system pressure) before installation. Do not save and reuse parts.
291500 KIT FOR OSV VALVE
Quantity Part No. Description Quantity Part No. Description
1 2057A0 Seal Ring (Down piston) 1 210900 Seal Cup (Down adjuster)
1 210000 Seal Ring (Closure sleeve) 1 217400 Seal Ring (Lower control block)
2 210200 Seal Ring (Piston rod) 2 227000 Adjuster Seal (Teflon ring)
2 210400 Seal Ring (Flanges, Pump & Jack) 1 28098A Piston Ring & Expander (Down piston)
7 210500 Seal Ring (Seal plug) 1 238500 Seal Ring (Spring guide)
1 210600 Seal Ring (Tripping speed adjuster) 1 210190 Seal Ring (Spring guide, new style)
1 2107LC Square C.S. Seal Ring (Face Seal)
6 2105LC Square C.S. Seal Ring (Face Seal) 1 2385LC Square C.S. Seal Ring (Face Seal)
1 210700 Seal Ring (Control block, Valve Body) 4 210800 Seal Ring (1/4-28 Button head screw)
IMPORTANT NOTICE
In order to ensure the retrofit of the ½” diameter piston assembly rod, the above kits do not contain parts to replace the main rubber seals on the pistons
for valves manufactured prior to January 1992. Additionally, no replacement seals are included for the down speed regulator portion of the UC2/2A.
Contact our sales department for replacement parts or reasonably priced factory reconditioned valves on an exchange basis. O-ring# 210300 has been
discontinued from the kit below – it is recommended that a new pump flange be installed to replace older flange requiring that seal.
291540 KIT FOR UC-4/4M/4MR VALVES
Quantity
Part No.
Description
Quantity Part No.
Description
1 204500 Seal Ring (Down guide retainer) 2 211300 Seal Ring (Ball check seat)
6 237200 Seal Ring (Relief cart. up/down strainer, DSR) 3 232100 Seal Ring (Flange, piston sleeves)
2 21019LC Seal Ring (Face seal, B44) 2 233600 Seal Ring (Manual Lowering / DSR)
4 210200 Seal Ring (Closure adj., transfer line) 1 2107LC Square C.S. Seal Ring (Face Seal)
14 210500 Seal Ring (Closure adj., Seal Plug) 2 2385LC Square C.S. Seal Ring (Face Seal)
1 283330 BPS Adjuster Assembly 2 238500 Seal Ring
28 210800 Seal Ring (1/4-28 Button head screw) 2 28371E* Piston Ring & Expander (Up / Down)
2 2110LC Seal Ring (Face seal) 15 263900 Seal Ring (10-32 Button head screw)
17 2105LC Square C.S. Seal Ring (Face Seal) 12 210700 Seal Ring (LS adjuster)
9 2372LC Square C.S. Seal Ring (Face Seal) 8 227000 Adjuster Seal (Teflon ring)
* Warning: When replacing Teflon Piston Ring (2371C0) the Expander Ring must be replaced as well.
SEAL KITS
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