Fluke 2470 User Manual

5-10 

Upper Thrust
Bearing 2460-21

Piston

Cylinder

Retaining Nut
(Thrust Block)

 

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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.