Fluke RUSKA 2470 - Manual (Page 40)

RUSKA 2470
Users Manual
5-10
Upper Thrust
Bearing 2460-21
Piston
Cylinder Retaining Nut
(Thrust Block)
gmq19.eps
Figure 5-11. Retaining Nut and Bearing
High Range Piston Assembly
Refer to Figure 5-12, 5-13, 5-14 and 5-15.
The High Range Piston and Cylinder is installed as follows:
1. Insert the Filter (2470-1-9), Filter Retainer (2470-1-8), and O-Ring (54-703-112) into
the column as shown in Figure 5-15. The O-Ring should be lubricated with Dupont
Krytox 240 Grease (45-351) before installation. All excess lubricant should be wiped
off, leaving only a slight film.
2. The piston and cylinder, after they have been cleaned in accordance with the cleaning
instructions in Chapter 6 and assembled per Figure 5-12, paying particular attention
to the orientation of the Thrust Bearing (2470-8). Verify that the Pin Vise 90-870, has
been cleaned and is free of any grease or dirt.
3. Gently clamp top end of the piston/cylinder assembly in the pin-vise as shown in
Figure 5-14. Take care to clamp the vise only on the uppermost .25 inches (6 mm) of
the piston.
4. Gently lift the Piston/Cylinder/Bearing assembly and place it into the column.
5. Remove the pin vise. Whenever carrying the Piston/Cylinder assembly with the pin
vise, protect the piston/cylinder from damage due to falls by positioning one’s free
hand below the assembly as shown in Figure 5-14.
6. Tighten the Cylinder retaining cap (2470-1-4) securely by hand while holding the
column with the opposite hand.
7. Before proceeding, check the level vial to verify that the base is level, adjust the level
of the base if necessary.
The gauge is now ready for operation.