6 Maintenance
19
Read the instructions carefully. The items refer to the parts list and service kits section.
6.3 General Dismantling & Inspection
Step 1
Inlet Collar
Loosen the Collar Set Screw (60) with a 5/64
” Hex Key, minimum 2 turns.
Remove the Inlet Collar (3) and Stator (10). If the (3) is tight in coming off of the main body, place the main body in a vise
equipped with soft jaw covers. Wrap a towel around the (3) and loosen it with an adjustable wrench.
Warning: Hold or turn on Stem (38). DO NOT hold or turn on Tee Housing (39) or Tee Housing Cap (35). Doing so
will damage the Geartrain (drawing 8).
Step 2
Geartrain
Remove the Cap Screws (57) from the Cap (2)
part using a 3/32” Hex Key.
Remove the (2) and Body Gasket (32). Alfa Laval Gamajet Equipment recommends replacing all Gaskets after dismantling.
Remove the Collar Small and Large O-rings (26) and (27). Inspect for wear or brittleness and replace as needed. A
sharpened brass pick may be helpful in starting to get the (26) and (27) off. Replace with new O-Rings if they show any signs
of wear or brittleness.
Loosen the Button Head Screws (51) from the Flow-Thru A2 Stem (50)
using a 5/64” Hex Key. It is advisable to use the ball
end or shorter end of the Hex Key to loosen and remove the (51).
Holding the Geartrain (drawing 8) and the Stem (drawing 13), remove the Geartrain and Output Shaft (21) from the unit.
Remove the Stem Large Gasket (33) from the assembly and set it aside. Alfa Laval Gamajet Equipment recommends
replacing all Gaskets after dismantling.
Step 3
Tee Housing
Using flat jaw pliers or an adjustable wrench, remove the Tee Housing Cap (35) from the Tee housing (39) by holding the
(35) still and rotating the (39).
Tip
: The (35) is a Left-Hand Thread.
Unscrew the Tee Housing Assembly (drawing 12) from the Flow-Thru A2 Stem (50).
Tip
: Again, this is a Left-Hand Thread.
Unscrew the Nozzle Housing Cap (41)
with a ¼” slotted screwdriver.
Pull the Nozzle Housing (40; drawing 11) from the nose of the Tee Housing (39).
Unthread and remove the Stem Cap (37; drawing 10).
Tip
: The Stem Cap is a Left-Hand Thread.
Pull the (39) from the Stem (38; drawing 9).
Remove the Tee Housing Bevel Gear (45) and the Tee Housing Upper Bearing (54) by pulling the (45) from the (38; drawing
9). Note how the Bearing has a bevel that fits into the top of the (45).
Check the water outlets on the nose of the (39); they should be free of debris.
Inspect the (45) for worn, damaged or sharp/pointed teeth.
Inspect the Tee Housing Bearings (54) and (53). Clean any deposits from the exterior of them and check their fit in the (39).
The external ring may be a tight fit with the inside of the (39). Once installed, however, the body of the Bearings should turn
freely. Also, the (56) should be free from damage, compression set, or deterioration.
Clean any deposits from the internal bore of the (39) and examine for excessive wear. Light scoring is acceptable, but the
(39) should be replaced if the inside diameter exceeds
23.57mm (0
.928”)
.
Inspect the (56) for deterioration (compression set or hardening) or damage and replace if necessary.
Inspect the Nozzle Housing Bearings (48) and (49). Clean any deposits from the exterior of the (48) and check their fit in the
Nozzle Housing (40). The external ring may be a tight fit with the inside of the (40). Once installed, however, the body of the
(48) and (49) should turn freely. Also, the (56) should be free from damage, compression set, or deterioration.
Clean any deposits from inner bore of (40) and examine for excessive wear. Light scoring is acceptable, but the (40) should
be replaced if the inside diameter exceeds
17.40mm (
0.685”)
.
Summary of Contents for GJ A2
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