Viking Pump TSM350 HG-08/HG-10 Helical Gear Pumps - Manual (Page 2)

SECTION TSM 350 ISSUE A PAGE 2 OF 10
MOUNTING
1. Surfaces to which the pump mounts must be clean, flat and free of dings and burrs.
2. Use ISO Class 8.8 or better capscrews to mount pump.
3. The 4 mounting capscrews for the HG-08 pumps must have a minimum of 12 millimeters
thread engagement, and must be evenly torqued to 22-24 Nm (16-18 ft lbs).
4. The 4 mounting capscrews for the HG-10 pumps must have a minimum of 18
millimeters thread engagement, and be evenly torqued to 79-83 Nm (56-62 ft lbs).
5. Standard HG Series pumps are designed to be used with jaw type couplings that do not
induce axial thrust on the pump shaft. If an improper type of coupling is used, internal
damage may result.
6. Do not strike or press the pump drive coupling to install. Internal pump damage will
result. If the coupling does not slide onto the shaft, inspect the coupling, shaft and
key for nicks or burrs and remove.
7. Once the pump has been mounted and the coupling installed, it is recommended to put
lube oil into the suction port and turn the pump by hand to make sure it turns freely.
Alignment
Check alignment after mounting.
1. Make sure that the driver has been “locked out” so that it cannot be inadvertently
started while checking alignment.
2. If the unit has a flexible coupling, remove any coupling guards or covers and check
alignment of coupling halves. A straight edge (piece of key stock will work) across the
coupling must rest evenly on both rims at the top, bottom and sides. See Figure 3.
3. Make a final check on alignment after the piping is hooked up.
USE STRAIGHT EDGE. THESE
SURFACES MUST
BE PARALLEL
CHECK WIDTH BETWEEN THESE SURFACES WITH INSIDE CALIPERS OR FEELER
GAUGE TO BE CERTAIN THE FACES ARE EQUAL DISTANCE APART AND PARALLEL.
FIGURE 3
Piping/Hose
The cause of many pumping problems can be traced to the suction piping. It should always be
as large in diameter and as short in length as possible.
Before starting the layout and installation of your piping system, consider the following points:
1. Never use piping smaller than the pump port connections. Piping larger in diameter than
the port connection is sometimes required to reduce friction losses.