norbar PNEUTORQUE PTM series, Operator'S Manual

18 

FIGURE 8 

– Silencer Replacement 

MAINTENANCE 

For optimum performance and safety, regular tool maintenance is required. The user maintenance is limited 
to the replacement of the drive square and the silencer. Any other maintenance or repairs should be carried 
out by Norbar or a Norbar distributor. Maintenance intervals will depend on the tool usage and the 
environment in which it is being used. The maximum recommended maintenance and recalibration interval is 
12 months. 

TIP: 

Steps the user can take to reduce the amount of maintenance required include: 
1.  Use the tool in a clean environment. 
2.  Use an air compressor fitted with a dryer. 
3.  Ensure the Lubro Control Unit has sufficient hydraulic oil. 
4.  Ensure the Lubro Control Unit delivers hydraulic oil at the correct rate. 
5.  Ensure the Lubro Control Unit is regularly maintained, see product manual. 
6.  Maintain the correct torque reaction. 

Air Lubrication 

Add Fuchs Silkair VG22, Shell Tellus S2 VX15 or equivalent good quality hydraulic oil to the Lubro Control 
Unit. 
 

Gearbox 

Under normal operating conditions it is not necessary to re-grease the gearbox. The gearbox contains 
Lubcon Turmogrease Li 802 EP or equivalent good quality grease.

Silencer 

The silencer (part number 18591) must be changed every 12 months. This may be more frequent for high 
tool usage or dirty environments. 

TIP: 

Change silencer with tool upside down, as shown, to ensure internal parts (spring and valve) 
are kept in place.

1.  Remove M4 screw (A) (part number 25381.10) using a 2.5mm hexagon key. 

2.  Remove pin (B) (part number 26284) using a pin punch. 

3.  Pull out air inlet tube (D) with base plate & silencer. 

4.  Remove silencer (E) from air inlet tube. 

5.  Fit new silencer (part number 18591) over air inlet tube. 

6.  Fit air inlet tube assembly (C, D & E) into handle against spring resistance. 

7.  Fit pin (B) with a hammer. 

8.  Fit screw (A) and torque to 0.5 N

ꞏ

m. Do not over tighten this screw as it is likely to break the base plate 

moulding. 

TIP: 

When refitting air inlet tube assembly into handle care should be taken to ensure correct 
alignment between air inlet tube and spring. It may be easier to fit the spring into air inlet tube 
first and secure with a small amount of grease.

C 

B 

A 

D 

E