7032 SOUTH 196th - KENT, WA 98032 - (253) 872-0141 / FAX (253) 872-8710
OPERATION / MAINTENANCE MANUAL
MODEL 50 VIBRATORY HAMMER WITH MODEL 260 POWER UNIT
I. GENERAL INFORMATION (Continued...)
I-3B. The Vibrator Gearbox
The vibrator gearbox contains two high amplitude eccentric weights cast in one piece with the gear.
The counterweight is filled, and therefore, enhanced with lead to increase eccentric moment. This
design is unique to the industry and was developed by the engineers of APE to solve a number of
problems associated with other types of vibrator machines. Both the eccentric and the drive gear
have been helically cut to provide high speed operation with reduced noise and wear. Vibration is
caused by the vertical movement created when the eccentrics are rotated. The eccentric and drive
gear are driven in line by one Volvo motor mounted on the outside face of the gearbox. The motor
is recessed for maximum protection. The eccentrics rotate on two shafts housed by four giant
spherical bearings. The gears and bearings receive lubrication as a result of the fluid splashing inside
the gearbox when the gears are rotated. The oil level is quickly determined by looking at the site
gauge. The Model 50 can be operated under water to a depth of 30 feet without modifications.
(Consult factory for depths below 30 feet.)
Figure 1-D. General Description of Vibrator Gearbox.
Page 1-5
Hydraulic Motor
(Volvo f12-110)
Eccentric Bearing Covers
Oil
Level
GLASS SIGHT GAUGE
CHANGE OIL ONCE PER WEEK
OR WHEN BLACK
(Applies to all Model 50 vibros regardless of
suppressor type)
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