| Push Rod Subassembly | | | | | | |
| L-2 Spacer | | | | | | |
| | Loc | Part No. | | | | |
| Retainer,Push Rod HT-400TM, Two Piece Nose, L-Spacer | 1 | 316.21066. | | | | |
| O-Ring, 90 Duro, 1 7/8 × 1 5/8 × 1/8, 568-223 | 2 | 8.34020. | | | | |
| Tie Rod, Push Rod, L-Spacer, HT-400TM | 3 | 316.25166. | | | | |
| Push Rod, Two Piece, L-Spacer, HT-400TM | 4 | 316.21065. | | | | |
| Retainer, Push Rod Seal Housing, L-2 Spacer, HT-400TM | 5 | 316.10012. | | | | |
| Housing, Push Rod Seal, Floating, L-2 Spacer, HT-400TM | 6 | 316.10013. | | | | |
| O-Ring, 70 Duro, 5 11/16 × 5 1/2 × 3/32, 568-161 | 7 | 70.33739. | | | | |
| Seal, Push Rod, L-Spacer, HT-400TM | 8 | 316.10014. | | | | |
| | | | | | | |
| Discharge Valve Subassembly |
| | | Plunger Size |
| | Loc | 3-3/8 inch | 4-inch | 4-1/2 inch | 5-inch | 6-inch |
| Retainer, Cover, HT-400TM | 1 | 316.2102. | 316.2202. | 316.2202. | 316.2502. | 316.2502. |
| Cover, Discharge, Double Guided Valve, HT-400TM | 2 | 316.2107. | 316.23091. | 316.23091. | 316.24044 | 316.24044 |
| Gasket, Discharge Valve & Cylinder Head Cover, HT-400TM | 3 | 316.21052. | 316.22052. | 316.22052. | 316.25052 | 316.25052 |
| Ring, Spacer, Discharge Valve & Cylinder Head Cover, HT-400TM | 4 | 316.21051. | 316.22051. | 316.22051. | 316.25051. | 316.25051. |
| Liner, Two Piece Bushing, Valve Guide, HT-400, Brass | 5 | 316.22005. | 316.22005. | 316.22005. | 316.22007. | 316.22007. |
| Insert, Two Piece Bushing, Valve Guide, Special, HT-400 | 6 | 316.22004. | 316.22004. | 316.22004. | 316.22006 | 316.22006 |
| Spring, Valve, HT-400TM, 36lb/in | 7 | 316.2108. | 316.2108. | 316.2308. | 316.27259 | 316.27259 |
| Valve, HT-400, Frac | 8 | 316.21007. | 316.21007. | 316.22048. | 316.24027 | 316.24027 |
| Insert, Valve, HT-400TM, Urethane, Acid/Frac Service(Yellow) | 9 | 316.21048. | 316.21048. | 316.22046. | 316.24026 | 316.24026 |
| Insert, Valve, HT-400TM, Urethane, Standard Service(Brown) | 9 | 316.21006. | 316.21006. | 316.22049. | 316.24037 | 316.24037 |
| Seat Valve, HT-400TM, Tapered | 10 | 316.21008. | 316.21008. | 316.210047. | 316.24024 | 316.24024 |
| O-ring, 90 Duro | 11 | 8.34037. | 8.34037. | 8.34041. | 8.34045 | 8.34045 |
| Retainer, Guide Bushing, HT400 | 12 | 316.21096 | 316.21096 | 316.23953 | 316.24043 | 316.24043 |
| | | | | | | |
| Suction Valve Subassembly |
| | | Plunger Size |
| | Loc | 3-3/8 inch | 4-inch | 4-1/2 inch | 5-inch | 6-inch |
| Retainer, Stop and Spring, HT-400TM, Mach. Cast | 1 | 316.22977. | 316.22977. | 316.23034 | 316.25840. | 316.25840. |
| Boot, Suction and Stop, HT-400TM | 2 | 316.25233. | 316.25233. | 316.25233 | 316.25233. | 316.25233. |
| Spring, Lock, HT-400 | 3 | 316.2125. | 316.2125. | 316.22252. | 316.22253. | 316.22253. |
| Liner, Two Piece Bushing, Valve Guide, HT-400TM, Brass | 4 | 316.22005. | 316.22005. | 316.22005. | 316.22007. | 316.22007. |
| Insert,Two Piece Bushing, Valve Guide, Special,HT-400TM | 5 | 316.22004. | 316.22004. | 316.22004. | 316.22006. | 316.22006. |
| Spring, Valve, HT-400TM, 36lb/in | 7 | 316.2108. | 316.2108. | 316.2308. | 316.27259 | 316.27259 |
| Valve, HT-400, Frac | 8 | 316.21007. | 316.21007. | 316.22048. | 316.24027 | 316.24027 |
| Insert, Valve, HT-400TM, Urethane, Acid/Frac Service(Yellow) | 9 | 316.21048. | 316.21048. | 316.22046. | 316.24026 | 316.24026 |
| Insert, Valve, HT-400TM, Urethane, Standard Service(Brown) | 9 | 316.21006. | 316.21006. | 316.22049. | 316.24037 | 316.24037 |
| Seat Valve, HT-400TM, Tapered | 10 | 316.21008. | 316.21008. | 316.210047. | 316.24024 | 316.24024 |
| O-ring, 90 Duro | 11 | 8.34037. | 8.34037. | 8.34041. | 8.34045 | 8.34045 |
| Retainer, Guide Bushing, HT400 | 12 | 316.21096 | 316.21096 | 316.23953 | 316.24043 | 316.24043 |
| | | | | | | |
| | | | | | | |
| Plunger/cylender Head Cover Subassembly |
| | | Plunger Size |
| | Loc | 3-3/8 inch | 4-inch | 4-1/2 inch | 5-inch | 6-inch |
| Retainer, Cover HT-400TM | 1 | 316.2102. | 316.2102. | 316.2202. | 316.2502. | 316.2506. |
| Cover, Cylinder Head, HT-400TM | 2 | 316.2107. | 316.2107. | 316.2207. | 316.2407. | 316.2507. |
| Gasket, 4 Discharge Valve & Cylinder Head Cover | 3 | 316.21052. | 316.21052. | 316.22052. | 316.25052. | 316.25074. |
| Ring, Spacer, Discharge Valve & Cylinder Head Cover | 4 | 316.21051. | 316.21051. | 316.22051. | 316.25051. | 316.25073. |
| Nose, Plunger, HT-400TM | 5 | 316.2131. | 316.2231. | 316.2331. | 316.2331. | 316.2331. |
| Seal, Plunger Nose Assembly, HT-400TM | 6 | 316.2130. | 316.2230. | 316.2330. | 316.2330. | 316.2330. |
| Plunger, Hard Surface, L-Spacer, HT-400TM | 7 | 316.21026. | 316.22294. | 316.23085. | 316.24296. | 316.25162. |
| Tie Rod, Plunger, HT-400TM | 8 | 316.21028. | 316.21028. | 316.21028. | 316.25165. | 316.25165. |
| Adapter, Pushrod, HT-400TM, Two Piece Nose | 9 | 316.21059. | 316.22302. | 316.23089. | 316.24336. | 316.25172. |
| | | | | | | |
| | | | | | | |
| Fluid-end/flange discharge section subassembly | | |
| | | Plunger Size | | |
| | Loc | 3-3/8 inch | 4-inch | 4-1/2 inch | | |
| Flange, discharge, HT-400TM, BLANK | 1 | | 316.22980. | 316.22980. | | |
| Flange, discharge, HT-400TM, CURVED, Rright Hand | 1a | 316.21676. | 316.23019. | 316.23019. | | |
| Flange, discharge, HT-400TM, CURVED, Left Hand | 1b | 316.21677. | 316.23017. | 316.23017. | | |
| Seal, Discharge passage,HT-400TM | 2 | 315.27117. | 316.2547. | 316.2547. | | |
| Nut, 1-14NF, Internal Wrenching, 1.03 TL | 3 | 316.11621. | 316.11621. | 316.11621. | | |
| Stud, HT-400TM Fluid End To Thick Discharge Flange | 4 | 316.23013. | | 316.23013. | | |
| Bolt, Tie, 1.375-12 UNF×32.4 in.,Top, Fluid End, HT-400TM, TC | 5 | 316.27488. | 316.27488. | 316.27488. | | |
| Nut, Top Tie Bolt, HT-400TM, TC | 6 | 316.25501. | 316.25501. | 316.25501. | | |
| Washer, Hardened,2.31 O.D ×1.43I.D.,For Top Tie Boldt, | 7 | 316.22493. | 316.22493. | 316.22493. | | |
| Spacer, Inner, Discharge Passage Seal,HT-400TM | 8 | 316.2145. | 316.2545. | 316.2545. | | |
| Fluid End Section, HT-400TM PUMP,Not Sleeved | 9 | 316.21951. | 316.22982. | 316.23951. | | |
| Nut, Elastic, Stop,3/4-in.,16 NF | 10 | 70.32760. | | 70.32760. | | |
| | | | | | | |
| Packing Subassembly |
| | | Plunger Size |
| | Loc | 3-3/8 inch | 4-inch | 4-1/2 inch | 5-inch | 6-inch |
| Adapter, Header | 1 | 316.21503 | 316.22503 | 316.23503 | 316.24503 | 316.27503 |
| Ring Header | 2 | 316.21501 | 316.22501 | 316.23501 | 316.24501 | 316.27501 |
| Packign Set, 4-in.x 5-in, x 1/2-in. Stock, 3 Rings, Hard, Acid Service | 3 | 316.21525 | 316.22525 | 316.23525 | 316.24525 | 316.27525 |
| Ring, Backup, Packing, 4-in x 5-in. | 4 | 316.21393 | 316.22393 | 316.23393 | 316.24393 | 316.27393 |
| Carrier, Seal and Packing, 4-in | 5 | 316.21396 | 316.22396 | 316.23396 | 316.24396 | 316.27396 |
| Seal, Lube, Packing, WQ, 4-in x 4-1/2-in. x 9/16-in | 6 | 316.21395 | 316.22395 | 316.23395 | 316.24395 | 316.27395 |
| O-Ring, 90D, 5-in. x 4 3/4-in.x 1/8-in | 7 | 8.34040 | 8.34045 | 8.34049 | 8.34053 | 8.3405 |