0335309 JOHNSON GEAR, Drive, starter

Introduction
The 1U-8860 Large Engine Blowby Pickup Group is an optional pickup for use with the 8T-2701 Blowby/Air Flow Indicator.It contains a large 38 mm (1.5 in) I.D. pickup which allows it to be used on large engines without increasing the crankcase pressure.It is designed to monitor the blowby volume on Caterpillar 3500 and 3600 series engines and the larger D300 series engines as well as competitive large engines.The range of this pickup is 94 to 1888 Liters Per Min. (L/min), (200 to 4000 Cubic Feet Per Hour [cfh]).Due to its all metal construction and large size, it is suitable for permanent installation on engines so blowby can be continuously monitored, making it useful for dynamometer rooms or marine or gen set installations.The pickup group can also be used to measure air velocity such as radiator cooling air flow. When connected to the 8T-2701 Blowby/Air Flow Indicator, it provides a digital display of the blowby value (the volume of exhaust gas escaping to the crankcase). This blowby value can be used as an indication of engine condition.However, it should not be used as a stand alone "good/bad" indicator for engine overhaul. It can be used as a signal that other engine condition indicators such as oil consumption, low power, hard starting, and excessive fuel consumption should be checked to determine if an engine is in need of maintenance.The large blowby meter has no moving parts. An ultrasonic sound vortex shedding principle is used to measure the air flow. This principle makes the pickup reliable and virtually maintenance free.This unit will be used to replace the smaller 8T-2685 Pickup for the measurement of 3500 series engine blowby. The 8T-2685 Pickup can be used on these engines, but only for a short duration test since the 50.8 mm (2 in) engine breather tube is reduced to 15.7 mm (.63 in) during the test. The 8T-2701 Blowby/Air Flow Indicator will be used with the larger probe, however a 1U-8863 Conversion Group must be installed to make it accurate. Refer to Installation of the 1U-8863 Conversion Group.Refer to Special Instruction SEHS8712 for additional information on the Blowby/Air Flow Indicator.Adaptability
When used with the 8T-2701 Indicator, the 1U-8860 Pickup can be used to measure the blowby on any engine within the blowby range of 94 to 1888 L/min (200 to 4000 cfh). This includes the larger Caterpillar D300 Engines, the 3500 and 3600 series engines.Smaller D300 and 3500 engines may not have enough blowby at idle or partial load to give a reading when they are in good condition. Therefore, the indicator display will read zero until the engine is loaded.1U-8860 Large Engine Blowby Pickup Group
(1) 6V-7145 Case NEEG2332 Decal (1U-8860 Group)(2) 1U-8861 Pickup - Large Engine Blowby NEEG2331 Decal (1U-8861)(3) 1U-8863 Conversion Group - Large Pickup(4) 9M-0164 Hose Clamp - Worm Drive 12.7 mm × 63.5 mm Dia. (.50 in × 2.50 in Dia.) 2 Required.(5) 1U-8868 Hose, Rubber - 57 mm ID. × 305 mm (2.3 in ID. × 12.0 in) (Goodyear Part No. 56036).(6) SEHS8984 Special Instruction (not shown).Optional Items
(1) 8T-2701 Blowby / Airflow Indicator(2) 8T-5297 Cable - Blowby Pickup 915 mm (3.0 ft)(3) 6V-2198 Cable - Blowby Pickup 5486 mm (18.0 ft)(4) 5P-7366 Cable - Indicator Power 5486 mm (18.0 ft)(5) 8T-5268 Converter, 110/220 Volts AC, 50/60 Hz for powering 8T-2701 Indicator. Supplies 11 to 20 Volts DC at 0.3 Amp. (Max. Current).(6) 8T-2700 Blowby / Airflow Indicator Group for Small Engines, Complete (not shown).Specifications (When used with the 8T-2701 Indicator)
Blowby Measuring Range:Liters Per Minute (L/min) ... 94 to 1888Cubic Feet Per Hour (cfh) ... 200 to 4000 Air Flow Measuring Range: (With Blowby V1.20 PROGRAM installed in 8T-2700 Indicator:Meters Per Minute (M/min) ... 83 to 1656Feet Per Minute (f/m) ... 272 to 5436 Accuracy:The system accuracy is 10% of reading. Resolution:Blowby: 1 L/min (1 ft3/m)Airflow: 1 M/min (1 ft/m) Operating Temperature:Pickup: -18 to 121°C (0 to 250°F) Storage Temperature:Pickup: -40 to 232°C (-40 to 450°F) Probe Size:Length: 382 mm (15.0 in)Outside Dia.: 50.8 mm (2.00 in)Inside Dia.: 38.1 mm (1.50 in)Width: 113 mm (4.5 in)Height: 130 mm (5.2 in) 1U-8860 Group Case Size:432 × 330 × 114 mm (17.0 × 13.0 × 4.5 in) Weight:1U-8860 Group: 6.1 kg (13.50 lb)1U-8861 Pickup only: 3.0 kg (6.60 lb) Power:Provided by the PICKUP connector on the 8T-2701Blowby/Air Flow Indicator.Installation of the 1U-8863 Conversion Group
A 1U-8863 Blowby V1.20 Conversion Group integrated circuit (1) is packaged with the 1U-8860 Large Engine Blowby Pickup Group. This integrated circuit contains the program which makes the large pickup readings accurate.The integrated circuit must be installed in the 8T-2701 Blowby/Air Flow indicator you will be using. Once this is completed, the 8T-2701 indicator will be accurate for both the Large Blowby Pickup and the Small Blowby Pickup. The 1U-8863 Conversion Group (1) is the small plastic box packed in the front storage area of the large pickup case. Open the small plastic case to identify the conversion group integrated circuit memory, but DO NOT remove it at this time. It should be marked "1U-8863 Blowby Gp. V1.20".Use the following instructions to install the integrated circuit in the 8T-2701 Indicator which will be used with the large blowby probe.
The 1U-8863 conversion group integrated circuit memory may be damaged by static electricity discharge. DO NOT handle in a carpeted, dry, area where static electricity may be present.
Installation Instructions
1. Remove six screws (2) from the rear cover and remove cover (3). 2. Remove battery (4) from the holder. Use a small screwdriver to pry the old Blowby V1.19 integrated circuit memory from its socket and remove. This part is to be replaced and is no longer needed.3. Remove the 1U-8863 Blowby Group V1.20 integrated circuit (1) from its protective plastic case and very carefully install it into the socket next to the battery holder (5) as shown above. The notch in the end of item (1) must be at the battery holder end of the socket. Check to make sure all of the pins are in the