PROBLEMS - CAUSE - REMEDY
Mill furls out, but wheel continues to turn slowly.
Cause 1: Excess wear in upper furl lever connections.
Remedy is to change #528 to #528 1/2 or #528
3/4 which are extra long to compensate for wear.
Cause 2: #690 brake band.
The 690 has no lining on the band. It depends
on metal contact to work. Replace
if worn with new 690 brake band.
Cause 3: Furl linkage worn in rivets and connections of #609
Replace the #609 Furl Lever.
Mill jerks while operating.
Cause 1: Cylinder leathers may have swelled and are binding in cylinder
barrel.
Replace your leathers.
Cause 2: Cylinder barrel may have been crushed or distorted by using
pipe wrench.
Never use pipe wrench on brass cylinder.
Replace if damaged.
Cause 3: Pump rod couplings may be catching at pipe joints.
Find problem connection and correct it.
Cause 4: Stuffing box nut may be too tight.
Loosen and repack the stuffing box. If rod is
scored or pitted, replace it.
Mill knocks at bottom of stroke.
Cause 1: #608 yoke is hitting top of mast pipe nut #578.
Motor position needs raised. Add some #521
split washers to post.
Cause 2: Turntable washers may be worn. Replace #521 split washers and
grease them at turntable of mastpipe.
Cause 3: Plunger in cylinder hitting lower check valve in cylinder
bottom.
Adjust your rod. Shorten the rod. Sometimes rod
will stretch after installation in deep set wells.
Cause 4: Stuffing box may be too tight.
Loosen nut and repack gland.
Cause 5: Pitman arms may be worn excessively.
Replace the pair of pitman arms. Never replace
just one.
Pitman arms keep breaking.
Cause 1: Large gears misaligned. Cause pitman arms to operate in bind.
Remove a #705 large gear and realign the boss
on it with the one on the other 705.
Cause 2: #752/852 bearing between large gears is worn.
Replace the #752/852 bearing and if necessary
the #720 shaft.
Cause 3: You replaced only one #705 or one #686 in the field.
Always replace large gears and pitman arms in
pairs so load is distributed evenly.
Cause 4: Mill may be overloaded.
Check table for recommended cylinder size and
depth. Setting mill to short stroke may eliminate the problem.
Cause 5: Mill may be loaded too heavy on down stroke, due to stuffing
box too tight.
Check stuffing box and repack it if necessary.
Oil leaking down mast pipe.
Cause 1: Too much oil in gear case and it runs into turntable oiling
hole.
Use specified amount of oil for your mill size.
Do not overfill. Check helmet for bullet holes which could allow rain in, causing the floating of the oil. This will also
leave your mill running in water
and subject to wear.
Cause 2: Lock washer #579 may be offset to one side, causing it to rub
the large gears and pick up oil.
Oil leaking around hub and onto the wheel.
Cause 1: Oil collector #520 may be plugged, preventing it from picking
up oil from
oil pocket inside the hub.
Cause 2: Using oil that is too heavy and will not flow or plugs
passages.
Drain and flush case with kerosene and refill
with windmill oil.
Cause 3: #730/830 shaft bearing may be worn excessively.
Replace the bearing if necessary.
Cause 4: May be using detergent type oil.
Refill with non-detergent oil. Windmill oil is
non-detergent.
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