Page 12
4990497003 Date: 11/2016
TR20 Installation, Operating & Maintenance Manual
Installation
3.5
PTO and prop shaft drive alignment
(cont.)
Alignment - See Figure 8
The axis on the majority of PTO’s is mounted at approximately 2° - 5° to the
horizontal, which reflects the angle of the engine and gearbox.
The compressor should be mounted so that its drive axis is parallel to the
PTO’s drive axis.
The compressor should also be mounted so that the prop shaft angle between the
PTO and the compressor input in any plane is less than or equal to 12°.
Consideration should be given to the prop shaft length when mounting the machine.
The prop shaft should be sized so that it always has sliding clearance.
It is recommended that a torque limiting device should be installed between the
compressor and PTO drive flanges to protect the drive line against all eventualities.
Torque limiting couplings are supplied as an optional ancillary.
3.6 Pipework
Figures 10a and 10b show a breakdown of packages 1 and 2.
Flexible pipe is provided in the inlet induction kit with both packages.
Where any pipework is to be fabricated using slip-on-weld flanges, such as to the
inlet in Fig 9, the following points should be followed to prevent damage to the
machine and contamination of the discharged product.
• All inlet pipework must be stainless steel or thick wall aluminium to help prevent
corroded particles entering the machine and reduce noise emissions.
• Outlet pipework can be fabricated from any material (including mild steel) to suit
the application.
• All fabricated pipework, should be de-scaled/cleaned before commissioning the
compressor.
• Pipework should be attached to the vehicle chassis using flexible mountings to
prevent unnecessary vibration and noise transfer.
• A flexible element is recommended in the discharge pipework (and inlet
pipework when necessary) to prevent distortion of the TR20 from the fabricated
pipework through chassis movement and heat expansion.
3.7
Commissioning Filter
The compressor is supplied with a commissioning filter fitted to the inlet
port to prevent debris entering the machine during the installation and initial
commissioning processes.
Also check the prop shaft
manufacturers information.
NOTE
After the initial 15 minute
commissioning run (at 900rpm),
the filter
must
be replaced with
the standard inlet flange gasket.
Prolonged or higher speed
operation with the filter fitted
will result in machine failure.
Tighten item 1 fig. 9 to a
torque of 50 Nm. See above.
NOTE
Figure 9. Inlet Flange
The compound prop shaft angle
must also be less than 12°.
NOTE
CAUTION
1
