Graco A Series Repair Manual page 10

Service
13. Torque packing nut (202) as follows:
Models
16X414, 16X418, 16X419, 16X420,
16X421, 16Y602, 16Y599, 17N693,
17R044
16X426, 16X427, 17N694, 17R042
10
14. Remove o-ring (228) when pump packings begin to
Torque
100 ± 10 in-lb
(11.3 ± 1.1 N•m)
140 ± 10 in-lb
(15.8 ± 1.1 N•m)
leak after extended use. Then tighten packing nut
down until leakage stops or lessens. This allows
approximately 100 gallons of additional operation
before a repacking is required.
202
228
ti7568b
332922D