I have just completed the 50 hour maintenance on my L-2501. I have a question regarding grease fittings. The manual shows a grease fitting for the left and right tie rod ends and grease fittings for the brake and clutch pedal pivots. I found another grease fitting behind the front axle shown in a picture below. This fitting will not take any grease. Can someone tell men the purpose of this fitting and if there are any other grease fittings (not including the FEL). Thank You.