Nexen RPS16G-C0070T/360-EP2U 966554 - Manual (Page 16)

FORM NO. L-21252-B-1209 16
LUBRICATION
The pinion needle bearings are sealed and lubricated for
life and cannot be serviced.
Nexen recommends lubricating the gear teeth every 2
million pinion revolutions or 6 months, but it may need to
be lubricated more frequently based on the application
conditions, and observable tooth or roller wear.
When lubricating the RPG system inspect the pinion roll-
ers and gear teeth for any abnormal wear patterns and
ensure the pinion rollers are not seized or have excessive
play. Wear on the edges of the gear teeth (not uniform
across the tooth face) or rings on the rollers indicate an
alignment problem which should be corrected to obtain
maximum system performance and life.
The rollers in new pinions, especially larger sizes, can
seem difficult to turn due to seal drag. This improves as
the pinion breaks in.
THK AFA grease is recommended for gear tooth lubri-
cation. Nexen offers this grease under product number
853901. Greases for special applications such as food
grade, vacuum, or others are allowed if they use a syn-
thetic base, a polyurea thickener, and meet the following
Kinematic Viscosity Levels: CST@40C = 25; CST@100C
= 5. Contact Nexen for recommendations on alternative
greases.
The RPG system can be lubricated in two ways:
1. Apply grease to the pinion rollers and roll the pinion
back and forth 5 times over one meter circumference
of gear teeth, repeating the process until the entire
gear is lubricated.
2. Using a swab apply a very small dab of grease on the
middle of each tooth face and rotate the ring gear 5
times.
Wipe excess grease from the sides of the gear and pinion
body to prevent grease being thrown off during operation
and for general cleanliness.