GMC 1990 Light Truck Repair Manual page 366

6A-14 GENERAL ENGINE MECHANICAL
Figure 22—Flat Type Hydraulic Lifter Assembly
)Q |
Clean
All parts in CLEAN solvent. Remove all gum and
varnish deposits.
Inspect (Figures 22, 23, and 24)
Plunger (226) for scoring and wear.
— Pushrod seat (228). If worn or rough, also check the
mating pushrod.
221. Lifter Body
222. Plunger Spring
223. Check Ball Retainer 228. Pushrod Seat
224. Check Ball Spring
225. Check Ball
Figure 23—Flat Type Hydraulic Lifter Components
229-----
228-----/
226. Plunger
227. Metering Valve
229. Retainer
B-05236
230 221
223 225
\
l i e
222 224
221
. Lifter Body
222
. Plunger Spring
223. Check Ball Retainer
224. Check Ball Spring
225. Check Ball
Figure 24—Roller Type Hydraulic Lifter Components
Important
Do not attempt re-conditioning by taking parts from
other unserviceable lifters.
* Assemble (Figures 22, 23, 24, 27, and 28)
Important
• Absolute cleanliness is necessary when
assembling the hydraulic lifters. Use only
A. Screwdriver
B. Pushrod
229. Retainer
Figure 25—Removing the Retainer (Typical)
227 229
U i
226 228
226. Plunger
227. M etering Valve
228. Pushrod Seat
229. Retainer
230. Roller
B-09402
B-05238