SPECS&MAINTENANCE
McL-12HB ZIPPER
SPECIFICATIONS OF McL-12HB
EARTH BORING MACHINE
Tunnel Diameter
Free or Cased Bore 3”-12” (8-30 cm)
Chain Final Drive
Hex Size 13/16” (2.06 cm)
(customer to specify) 1-1/8” (2.85 cm)
1-3/8” (3.50 cm)
1-5/8” (4.12 cm)
Dimensions
Carriage and Pusher
Centerline Height 9-1/2” (24.1 cm)
Width 26” (66.0 cm)
Height 44” (111.8 cm)
Weight (Less Dog Plate) 320 lbs. (145 kg)
Weight (Dog Plate) 40 lbs. (18 kg)
Master Track
For 4’Augers
Length 7’ (213 cm)
For 3’Augers
Length 6’ (183 cm)
Weight 85 lbs. (39 kg)
Extension Track
Length 6’ (183 cm)
Weight 75 lbs. (34 kg)
Performance
Advance Thrust
@ 2500 PSI 24,500 lbs. (109 kN)
Drive Chuck Speed
@ 20 GPM (Forward & Reverse) 120 RPM
Drive Chuck Torque
@ 2500 PSI
(Forward & Reverse) 1030 ft.* lbs. (1340 Nm)
Quick Disconnects
Parker NS-752-12FP and NS-751-12FP
Female disconnect ON MACHINE is the high pressure
side of system.
Specifications are subject to change without notice. All
weights and dimensions given are approximate. Exact
measurements should be verified if required.
MAINTENANCE INSTRUCTIONS
Review the Engine and Operation Manuals supplied
with the power source before starting and operating the
machine. Follow manufacturers recommendations for
operation and maintenance to maintain your engine
warranty.
REPAIRAND MAINTENANCE/GENERAL
Carriage/Tightness of Nuts & Bolts
Check four (4) bolts that mount chuck to the drive shaft
flange of the McL-12HB initially, then check each week
when in continuous use. Each bolt should have lock
washer. Tighten as needed.
Check four (4) bolts that mount hydraulic motor to the
McL-12HB carriage initially, then check each week
when in continuous use. Tighten as needed.
Check nine (9) bolts that hold sprocket cover to the
back of the McL-12HB initially, then once each month
when in continuous use. Tighten as needed.
Check all hydraulic fittings initially, then check each
week when in continuous use. Tighten as needed,
taking care not to twist hoses from original positions.
Check nuts (4) on cam rollers initially, then once each
month when in continuous use. Tighten as needed.
Carriage/Lubrication
Approximately every 50 hours of operation, lubricate
the chain drive of the McL-12HB. To do so, use the
grease fitting on the top of the chain guard. Use about
5-10 pumps with spindle rotating slowly. Do not over
lubricate the chain. Also, periodically grease the cam
rollers with all purpose bearing grease.
Carriage/Quick Disconnects
Wipe each Quick Disconnect with a clean rag to
remove excess oil and dirt. Always return covers to
Quick Disconnects when machine is not in use.
Carriage/Miscellaneous
Once a month, inspect the two (2) hitch pins (also
called Auger Pins, R-Clips, R-Pins) that hold the clevis
pins in place. Replace if worn or damaged.
Also, check hitch pins that hold machine hold downs in
place. Replace if worn or damaged.
After each boring operation is completed, clean the
carriage to remove dirt and mud. Use water if avail-
able. Always clean the unit before storage.
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