Haskel 4B Serie Manuel De Fonctionnement Et D'entretien page 4

C. Discard both seal and o-ring; discard the bearing only if visibly worn or damaged.
4.5 Outlet Check Valve
Two basic arrangements are used depending on pump model. Ratios -14 through -37 have the valve seat
in the cast body, with components retained by fitting (66). Ratios -55 through -150 use a cartridge outlet
check housed in fitting (66).
A. To access check valve parts for ratios -14 through -37, unscrew fitting (66). For ratios -55
through -150, use a screwdriver to unscrew retainer (60) from fitting (66).
B. Use a hooked tool to remove all of the other parts easily, in the sequence shown on the
assembly drawing.
C. Examine the seat for contamination or damage and replace if necessary.
5.0 Reassembly
A. To reassemble the new seal package, place the hydraulic body on the bench with the liquid
end pointed up. Use a small stick or other guide to guide the bearing, seal, and o-ring, (in that
order), down into position. Make sure each part centers and seats itself correctly; If
necessary, grease with Haskel lubricant.
NOTE: Insert the seal with the narrow lip face up. Be very careful to not nick or mar this lip.
B. To reassemble the inlet check valve, place the inlet check fitting in a vertical position (port
down) on a flat surface, and insert all the check valve parts according to the assembly
drawing.
To Install the Check Assembly Into the Pump Body:
1. Place the flat side of the plastic spacer on top of the spring retainer in the check
assembly and hold the spacer.
2. Lower the hydraulic body down over the plastic spacer onto the inlet fitting. Turn the inlet
fitting until threads engage.
3. Tighten to the required torque. As follows:
C. For 4B-100 and 4B-150 model pumps, replace the item (47) o-ring from the air drive (inside
end) of the hydraulic body.
D. Carefully insert the plunger through the seal package.
E. Lubricate the large air piston o-ring (56225) with Haskel 50866 grease, and push the barrel
down at a slight angle to permit it to fit over the o-ring.
F. Lightly lubricate the inside of both ends of the barrel. Push it down over the large static o-ring
568154-2 on the hydraulic body casting. Press with the heel of your hands until it snaps into
place.
G. To install the upper cap, lightly lubricate the end o-rings on the pilot and flow tubes and insert
them into the hydraulic cap in their proper positions. Guide the upper air drive cap so that it
engages both tubes and the barrel at the same time. Again, push with heel of your hands to
snap the cap into position.
H. Orient the air drive and liquid section ports horizontally on the bench with the muffler port
facing up. Place the mounting brackets in position, one on each end of the air drive. Put both
of the longer tie bolts through to hold the brackets, and align the parts. Finger tighten both
bolts and nuts.
I. Insert both shorter tie bolts and finger tighten both bolts and nuts.
Air Driven Liquid Pump 4B Series • OM-16F
80 ft.-Ibs (-14 thru -30)
50 ft.-Ibs (-37)
70 ft.-Ibs (-55 thru -150)
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