20
5.3.2 Gear Reducer
The gear reducer is shipped filled with oil. Check the oil level every six months and add oil if required. Under
normal sampler operating conditions the oil should be changed once every two years.
Use "Hub City #GL-460" gear lubricant, AGMA number 7 Comp., or equal. Lubricant must be compatible with
bronze gear materials and nitrile rubber seals.
5.4 Mechanical Repair Procedures
5.4.1 Limit Switch Cam Adjustment
The limit switch cam actuates the limit switch by pushing the switch plunger inward. The correct cam position is
shown in Figure 5-1. Follow the instructions below.
A. Shutoff and lockout all power.
B. Remove the six 1/4-20UNC hex head screws attaching the cover to the sampler drive housing.
C. Loosen the two 1/4-20UNC hex head screws attaching the limit switch cam to the 120 tooth spur gear.
D. Slide the limit switch cam to the position shown in Figure 5-1. Hold the 0.03" dimension and re-tighten
the two 1/4-20UNC hex head screws.
FIGURE 5-1, LIMIT SWITCH CAM ADJUSTMENT
