Nexen PRD1100 966902 - Manual (Page 8)

8 FORM NO. L-21274-A-0113
Table 1 Pinion Bushing Bolt Information
Model Bolt Type Tightening Torque
RPS16 M4 3.5 Nm [30.98 in-lb]
RPS20 M5 7.0 Nm [61.96 in-lb]
RPS25 M6 12.0 Nm [106.21 in-lb]
RPS32 M6 12.0 Nm [106.21 in-lb]
RPS40 M6 12.0 Nm [106.21 in-lb]
RPS4014 M8 38.0 Nm [336.26 in-lb]
Flange Mount Pinion Installation (ISO 9409)
1. Clean the gearhead mounting face and pilot bore,
inspecting for contaminates, burrs, or surface defects
that would interfere with full contact between the
pinion and flange.
2. Using a test indicator, check the rotational flatness of
the face as shown in Figure 5. Position the contact
point of the indicator where the pinion will contact
it. Rotate slowly for a minimum of one complete
revolution and note the total amount of variance.
Pinion Side
Gearhead Side
Figure 7
3. Position the contact point of the indicator at bottom
dead center of the pilot bore as shown in Figure 6.
Rotate slowly for a minimum of one complete turn and
note the amount of total variance in one rotation.
10. Once the fasteners are fully torqued verify the pinion
is centered on the gear. If not, measure the positional
error and then remove the pinion as described in the
Disengaging The Roller Pinion section on page 12.
Repeat the pinion installation procedure and offset the
pinion by the recorded error plus the previous off set
value. When the pinion is fully torqued and properly
centered then verify pinion concentric variation at
the center of the pinion rollers as shown in Figure 9.
Variation on this surface must be less than ± 0.030
mm [±0.0010 in].
4. If either of the following conditions are true, the
gearhead itself may contribute to excessive pinion
preload variation, a reduction in pinion life and/or
accuracy. The user should consider having the
gearhead re-worked or replaced.
a. The measured total variance of the mounting face is
greater than 0.013 mm [0.0005 in].
b. The measured total variance of the pilot bore wall is
greater than 0.005 mm [0.0002 in].
Note: In some cases an adapter will be required to mount
the pinion on the reducer. If so, proceed with Step
5, if not, skip to Step 13.
5. Clean the adapter flange and pilot where it will contact
the gearhead flange inspecting for contaminates,
burrs, or surface defects that would interfere with full
contact between the adapter and gearhead flange.
See Figure 7.
6. Apply a serviceable thread locking compound to the
adapter mounting screws then assemble the adapter
to the gearhead, leaving the mounting screws snug
but do not tighten at this time.
7. Position a test indicator at bottom dead center of
the pilot bore wall as shown in Figure 8 and zero the
indicator. Rotate the assembly slowly by using the
gearhead input shaft a minimum of one complete
revolution while noting the amount of total indicator
variance and mark the angular location in which the
lowest reading occurs throughout the rotation.
.
Figure 5
Figure 6
CAUTION
Preload must be applied before putting your
system into operation. Refer to APPLYING
PRELOAD to properly set preload for your
RPS system.